Communicating Recommendations in Public Health Emergencies: The Role of Public Health Authorities

Social Determinants of Health and Satisfaction With Sources of Information About COVID-19 Related to Vaccine Uptake in a Safety Net Healthcare System

BACKGROUND

Vaccination is a critical tool to combat the COVID-19 pandemic. Yet, vaccine uptake varies across communities and is often affected by sociodemographic factors and accessibility.

OBJECTIVES

This article outlines a pilot study aimed to examine factors associated with COVID-19 patients within one of the nation's largest safety net healthcare systems.

METHODS

A cross-sectional survey design was conducted with adults over 18 years of age eligible to receive the COVID-19 vaccine. Descriptive analysis of survey data collected in 2021-2022 was employed. Unconditional and multivariate logistic regression analyses were conducted to examine associations between sociodemographics, social factors, and COVID-19 vaccine uptake.

RESULTS

Study participants ( N = 280) were a diverse patient population, primarily low-income and majority Hispanic/Latinx, with low education levels, but with a high level of COVID-19 vaccine uptake and a high rate of intent to vaccinate again. Approximately 22% report having unstable housing, and 46% experiencing food insecurity. Most trusted sources for COVID-19 data included mainstream media, including TV, radio, and newspapers, and friends, family, or other informal networks. We found that respondents who were satisfied or very satisfied with COVID-19 information received from healthcare providers or the government had higher odds of vaccine uptake rates.

DISCUSSION

These findings highlight the critical role of access to the COVID-19 vaccine and sources of information as an independent factor in COVID-19 vaccine uptake among patients within a safety net healthcare system. This study expands the literature on COVID-19 vaccine uptake, particularly in an underresourced region of the South Los Angeles community. Future research is needed to better understand the mechanisms between social determinants of health, perceived discrimination, and vaccine uptake.

Exploring community needs in combating aedes mosquitoes and dengue fever: a study with urban community in the recurrent hotspot area

BACKGROUND

Aedes mosquitoes are the main vector of dengue infection, a global health threat affecting millions of people annually. Conventional prevention and control methods against dengue outbreaks have only achieved marginal success. Recognizing the complex issue at hand, a multilevel participatory approach is crucial. Thus, alternative strategies that involve community engagement are increasingly being considered and attempted. While community-based vector control programs have been conducted, sustaining behavioral changes among the population remains a challenge. This study aimed to identify the specific community needs in combating Aedes mosquitoes and dengue fever as a basis to guide the development of community-driven initiatives and foster a deeper sense of ownership in the fight against dengue.

METHODS

Between 1 August 2022 and 30 November 2022, we conducted a study in Hulu Langat district, Selangor, using a mixed-method design. All participants consented to the study, which comprised 27 participants (FGDs) and 15 participants (IDIs). The IDIs included two participants with a history of dengue fever, one community leader, one faith leader, seven local authorities, and four district health officers. Semi-structured interviews and discussions were performed among stakeholders and community members recruited via purposive and snowball sampling techniques. All interviews were audio-recorded before being analyzed using reflexive thematic analysis.

RESULTS

These results derived from qualitative data explored the perspectives and needs of communities in combating Aedes mosquitoes and dengue fever. Interviews were conducted with various stakeholders, including community members, leaders, and health officers. The study identified the necessity of decisive actions by authorities to address the impact of the dengue epidemic, the importance of community engagement through partnerships and participatory approaches, the potential benefits of incentives and rewards to enhance community participation, and the need for sustained community engagement and education, especially via the involvement of young people in prevention efforts. These findings provide valuable insights into the design of effective strategies against Aedes mosquitoes and dengue fever.

CONCLUSIONS

In short, there is an urgent need for a comprehensive approach involving multiple stakeholders in the fight against Aedes mosquitoes and dengue fever. The approach should incorporate efforts to raise awareness, provide practical resources, and foster community responsibility. The active involvement of teenagers as volunteers can contribute to long-term prevention efforts. Collaboration, resource allocation, and community engagement are crucial for effective dengue control and a healthier environment.

Parents' User Experience Accessing and Using a Web-Based Map of COVID-19 Recommendations for Health Decision-Making: Qualitative Descriptive Study

BACKGROUND

The eCOVID19 Recommendations Map & Gateway to Contextualization (RecMap) website was developed to identify all COVID-19 guidelines, assess the credibility and trustworthiness of the guidelines, and make recommendations understandable to various stakeholder groups. To date, little has been done to understand and explore parents' experiences when accessing and using the RecMap website for COVID-19 health decision-making.

OBJECTIVE

To explore (1) where parents look for COVID-19 health information and why, (2) parents' user experience when accessing and using the RecMap website to make health decisions, and (3) what knowledge mobilization activities are needed to increase parents' awareness, use, and engagement with the RecMap website.

METHODS

We conducted a qualitative descriptive study using semistructured interviews and a think-aloud activity with parents of children aged 18 years or younger living in Canada. Participants were asked to provide feedback on the RecMap website and to "think aloud" as they navigated the website to find relevant COVID-19 health recommendations. Demographic information was collected using a web-based questionnaire. A hybrid deductive and inductive thematic approach guided analysis and data synthesis.

RESULTS

A total of 21 participants (13/21, 62% mothers) were interviewed and participated in a think-aloud activity. The data were categorized into four sections, representative of key elements that deductively and inductively emerged from the data: (1) parent information seeking behaviors and preferences for COVID-19, (2) RecMap website usability, (3) perceived usefulness of the RecMap website, and (4) knowledge mobilization strategies to increase awareness, use, and engagement of the RecMap website. Parents primarily used the internet to find COVID-19 information and focused on sources that they determined to be credible, trustworthy, simple, and engaging. As the pandemic evolved, participants' information-seeking behaviors changed, specifically their topics of interest and search frequency. Most parents were not aware of the RecMap website before this study but found satisfaction with its concept and layout and expressed intentions to use and share it with others. Parents experienced some barriers to using the RecMap website and suggested key areas for improvement to facilitate its usability and perceived usefulness. Recommendations included a more user-friendly home page for lay audiences (separate public-facing user interface), improving the search and filter options, quicker navigation, clearer titles, more family-friendly graphics, and improving mobile-friendly access. Several strategies to disseminate the RecMap website were also expressed, including a mix of traditional and nontraditional methods (handouts and social media) in credible and high-traffic locations that parents frequent often.

CONCLUSIONS

Overall, parents liked the concept of the RecMap website but had some suggestions to improve its usability (language, navigation, and website interface). These findings can be used to improve the RecMap website for parents and offer insight for the development and dissemination of effective web-based health information tools and resources for the general public.

'It's quite a balancing act': A qualitative study of parents' experiences and information needs related to the COVID-19 pandemic

INTRODUCTION

Throughout the coronavirus disease 2019 (COVID-19) pandemic, parents and children faced significant challenges as a result of prevention measures implemented to control the spread of the disease. Ensuring that families have access to essential health information is critical for improving health outcomes and adherence to public health recommendations. Understanding parents' experiences and information needs related to the pandemic and associated health measures (e.g., vaccination, mask wearing, social distancing, etc.) will inform the development and dissemination of resources tailored to parents' needs to support informed decision making.

METHODS

We conducted a qualitative descriptive study. Between September and November 2021, parents across Canada were recruited online via social media and community organisation newsletters and listservs to participate in focus groups via Zoom. Focus groups were audio-recorded and transcribed verbatim. Data were coded and analysed using thematic analysis. Participants completed a demographic questionnaire before the focus groups (via SimpleSurveys).

RESULTS

Sixty-seven parents participated in 12 focus groups between October and November 2021. In relation to experiences, parents felt they were (1) constantly trying to balance everything, and (2) trying to do their best with the information they had at the time when making decisions. Regarding information needs, parents reflected on (1) how difficult it was navigating copious amounts of changing information and finding credible sources to rely on, (2) the need for resources that were easily accessible, credible and in plain language and (3) the need for resources that were tailored to their needs to support them and their children make informed decisions.

CONCLUSIONS

Trying to mitigate the risk of COVID-19 infection and adhere to public health recommendations, while balancing various factors (work, online learning, and social interactions) and navigating changing information, was overwhelming for many parents. Reflecting on their needs, parents suggested tailored resources that provided concise, credible information in plain language to help them make informed decisions and navigate conflicting information. These findings reveal important knowledge gaps and highlight areas that need to be addressed to support parents during the pandemic period and beyond.

PATIENT OR PUBLIC CONTRIBUTION

Members of our established Paediatric Parent Advisory Group (P-PAG) were involved as collaborators throughout the planning (grant proposal), development and execution of the study. P-PAG members gave input on the design of the questionnaire, interview guide, recruitment strategy and interpretation of findings.

Leveraging a Peer-to-Peer Approach to Mitigate Vaccine Misinformation and Improve Vaccine Communication During a Pandemic: Experiences From the Development of a Massive Open Online Course

The COVID-19 pandemic has not only led to massive global mortality and morbidity, but it has also fueled an infodemic of false and misleading information about COVID-19 and vaccines. The spread of misinformation and disinformation on vaccine safety and efficacy has contributed to vaccine hesitancy and distrust of public health institutions and has undermined the public health response to the COVID-19 pandemic. Because communication plays a monumental role in pandemic preparedness, a promising approach to countering the COVID-19 infodemic is empowering peers to serve as trusted messengers to provide accurate information using evidence-based communication approaches. With this in mind, we developed a massive open online course (MOOC) to provide the general public with the knowledge, skills, and resources to effectively navigate potentially contentious vaccine conversations with their peers, with a specific focus on parents. Within the first year of the course launch, 29,000 people had enrolled. Learners appreciated the information related to vaccine development, communication tips and techniques, and identifying and responding to vaccine misinformation. Over 1,000 learners who completed the course participated in an online evaluation survey. To address public distrust in healthcare providers, government, and science, our survey results indicate that peer-to-peer approaches to addressing vaccine hesitancy can empower community members to educate others and promote vaccine acceptance at scale.

A multimethods randomized trial found that plain language versions improved parents' understanding of health recommendations

OBJECTIVES

To assess the effectiveness of plain language compared with standard language versions of COVID-19 recommendations specific to child health.

STUDY DESIGN AND SETTING

Pragmatic, allocation-concealed, blinded, superiority randomized controlled trial with nested qualitative component. Trial was conducted online, internationally. Parents or legal guardians (≥18 years) of a child (<18 years) were eligible. Participants were randomized to receive a plain language recommendation (PLR) or standard (SLV) verison of a COVID-19 recommendation specific to child health. Primary outcome was understanding. Secondary outcomes included: preference, accessibility, usability, satisfaction, and intended behavior. Interviews explored perceptions and preferences for each format.

RESULTS

Between July and August 2022, 295 parents were randomized; 241 (81.7%) completed the study (intervention n = 121, control n = 120). Mean understanding scores were significantly different between groups (PLR 3.96 [standard deviation (SD) 2.02], SLV 3.33 [SD 1.88], P = 0.014). Overall participants preferred the PLR version: mean rating 5.05/7.00 (95% CI 4.81, 5.29). Interviews (n = 12 parents) highlighted their preference for the PLR and provided insight on elements to enhance future knowledge mobilization of health recommendations.

CONCLUSION

Compared to SLVs, parents preferred PLRs and better understood the recommendation. Guideline developers should strive to use plain language to increase understanding, uptake, and implementation of evidence by the public.

Governing public health emergencies during the coronavirus disease outbreak: Lessons from four Chinese cities in the first wave

The ongoing coronavirus disease (COVID-19) pandemic has had a far-reaching impact on urban living, prompting emergency preparedness and response from public health governance at multiple levels. The Chinese government has adopted a series of policy measures to control infectious disease, for which cities are the key spatial units. This research traces and reports analyses of those policy measures and their evolution in four Chinese cities: Zhengzhou, Hangzhou, Shanghai and Chengdu. The theoretical framework stems from conceptualisations of urban governance and its role in public health emergencies, wherein crisis management and emergency response are highlighted. In all four cities, the trend curves of cumulative diagnosed cases, critical policies launched in key time nodes and local governance approaches in the first wave were identified and compared. The findings suggest that capable local leadership is indispensable for controlling the coronavirus epidemic, yet local governments' approaches are varied, contributing to dissimilar local epidemic control policy pathways and positive outcomes in the fight against COVID-19. The effectiveness of disease control is determined by how local governments' measures have adapted to geospatial and socioeconomic heterogeneity. The coordinated actions from central to local governments also reveal an efficient, top-down command transmission and execution system for coping with the pandemic. This article argues that effective control of pandemics requires both a holistic package of governance strategies and locally adaptive governance measures/processes, and concludes with proposals for both a more effective response at the local level and identification of barriers to achieving these responses within diverse subnational institutional contexts.

Human vs. machine-like representation in chatbot mental health counseling: the serial mediation of psychological distance and trust on compliance intention

This study examined a serial mediation mechanism to test the effect of chatbots' human representation on the intention to comply with health recommendations through psychological distance and trust towards the chatbot counselor. The sample of the study comprised 385 adults from the USA. Two artificial intelligence chatbots either with human or machine-like representation were developed. Participants had a short conversation with either of the chatbots to simulate an online mental health counseling session and reported their experience in an online survey. The results showed that participants in the human representation condition reported a higher intention to comply with chatbot-generated mental health recommendations than those in the machine-like representation condition. Furthermore, the results supported that both psychological distance and perceived trust towards the chatbot mediated the relationship between human representation and compliance intention, respectively. The serial mediation through psychological distance and trust in the relationship between human representation and compliance intention was also supported. These findings provide practical guidance for healthcare chatbot developers and theoretical implications for human-computer interaction research.

Models and components in disaster risk communication: A systematic literature review

BACKGROUND AND AIM

Risk communication is considered a major factor in disaster risk management by the concerned policymakers and researchers. However, the incoherence of variables affecting risk communication in various studies makes it difficult to plan for disaster risk communication. This study aims to identify and classify the influential components in disaster risk communication.

MATERIALS AND METHODS

This systematic review was conducted in 2020. Databases included PubMed, Scopus, and Web of Science. In searching for articles, there was no limit on the date of publication and the language of the article. The research addressed both natural and man-made disasters. The Preferred reporting items for systematic review and meta-analysis protocols (PRISMA) checklist was followed throughout the research, and the quality of the papers was assessed using the mixed methods evaluation tool (MMAT).

RESULTS

In searching the articles, 3956 documents were obtained, of which 1025 duplicated articles were excluded. The titles and abstracts of the remaining documents (2931) were examined, of which 2822 were deleted, and the full text of 109 documents was studied for further assessment. Finally, after applying the inclusion and exclusion criteria and reviewing the full texts, 32 documents were considered to extract the data and for quality assessment. On studying the full text of the obtained documents, 115 components were found, which were classified into five groups (message, message sender, message receiver, message environment, message process) and 13 subgroups. In addition, the obtained components were classified as those proposed by the authors of the article and those obtained from disaster risk communication models.

CONCLUSION

Identifying the effective components in the disaster risk communication gives a more comprehensive view of risk communication to the disaster managers and executives and provides the decision-makers with an important platform to be able to use the components of risk communication and increase the impact of messages and ultimately increase people's preparedness for disasters in planning operations for the risk communication.

Vaccine Communication: Appeals and Messengers Most Effective for COVID-19 Vaccine Uptake in Ukraine

Throughout the COVID-19 pandemic, vaccine communication has been a challenge, particularly as some populations may be highly distrustful of information from public health or government institutions. To better understand the different communication needs in Ukraine, an online survey panel of 168 Ukrainian participants viewed six COVID-19 vaccination ads with three variations on vaccine messaging appeals (potential economic impacts of COVID-19 infection COVID-19 disease outcomes, and social norms related to vaccination) and two different messengers (a peer or a health provider). The ad featuring a health outcome appeal delivered by a healthcare provider was most favored (n = 53, 31.6%); however, across demographic categories, including vaccine hesitancy categories, participants expressed high levels of approval for all six variations of the COVID-19 vaccine ads. When participants ranked reasons why someone may not accept the COVID-19 vaccine, the most prevalent beliefs identified were that the vaccine was not safe, and that the vaccine was not effective. Findings from this study suggest that vaccine appeals focused on health outcomes delivered by healthcare providers are preferred by most individuals in Ukraine; however, individuals are motivated by a myriad of factors suggesting that for vaccine messaging to be most effective, communication should be varied in both appeal and messenger.

Can Trust Bring Satisfaction to the Festival Under Pandemic?

In existing festival research, trust is often placed at the post-experience stage by scholars, and there is no research to explore the relationship between festivalscape, trust, and experience. In addition, the main function of trust is to reduce uncertainty and risk perception. Existing festival-related research scenarios do not have typical risks, which will limit the findings of the research. This research focuses on festivals under covid-19 pandemic, which is a typical risky scenario. Exploring the antecedent variables and the consequences of the trust of the festival participants in this context may therefore make up the deficiency of existing research. Several interesting findings have been made: the perception of the festivalscape during the pandemic has been significantly simplified. Epidemic prevention measures and staff may increase trust, but trust cannot have a direct and significant impact on festival satisfaction. While staff positively strengthen trust, they will have a significant negative impact on satisfaction.

Communicating with Community: Health Disparities and Health Equity Considerations

This article explores why communicating with communities is important to the health of individuals as well as public health, and best practices of how. We outline the use of relevant theoretic frameworks, understanding the role of technological contextual changes, trust despite misinformation, health and digital literacy skills, and working with the community for effective reciprocal communication. Strategies for developing community communication are also enumerated and applied to addressing health disparities.

Canadian COVID-19 Crisis Communication on Twitter: Mixed Methods Research Examining Tweets from Government, Politicians, and Public Health for Crisis Communication Guiding Principles and Tweet Engagement

To foster trust on social media during a crisis, messages should implement key guiding principles, including call to action, clarity, conversational tone, compassion and empathy, correction of misinformation, and transparency. This study describes how crisis actors used guiding principles in COVID-19 tweets, and how the use of these guiding principles relates to tweet engagement. Original, English language tweets from 10 federal level government, politician, and public health Twitter accounts were collected between 11 March 2020 and 25 January 2021 (n = 6053). A 60% random sample was taken (n = 3633), and the tweets were analyzed for guiding principles. A tweet engagement score was calculated for each tweet and logistic regression analyses were conducted to model the relationship between guiding principles and tweet engagement. Overall, the use of guiding principles was low and inconsistent. Tweets that were written with compassion and empathy, or conversational tone were associated with greater odds of having higher tweet engagement. Across all guiding principles, tweets from politicians and public health were associated with greater odds of having higher tweet engagement. Using a combination of guiding principles was associated with greater odds of having higher tweet engagement. Crisis actors should consistently use relevant guiding principles in crisis communication messages to improve message engagement.

Aerobic exercise training improves endothelial function and attenuates blood pressure reactivity during maximal exercise in chronic kidney disease

Patients with chronic kidney disease (CKD) have exaggerated increases in blood pressure during exercise that are associated with endothelial dysfunction. We hypothesized that aerobic exercise training would improve endothelial function and attenuate blood pressure reactivity during exercise in CKD. Sedentary individuals with CKD stages III-IV underwent 12 wk of aerobic cycling exercise (n = 26) or nonaerobic exercise (n = 22, control). Both interventions were performed 3 days/wk and matched for duration. Endothelial function was measured via peripheral arterial tonometry and quantified as reactive hyperemia index (RHI). Peak oxygen uptake (V̇o_2peak) was assessed via maximal treadmill exercise testing with concomitant blood pressure monitoring. All measurements were performed at baseline and after the 12-wk intervention. A linear mixed model was used to compare the rate of increase in blood pressure during the test. RHI improved with exercise (Pre = 1.78 ± 0.10 vs. Post = 2.01 ± 0.13, P = 0.03) with no change following stretching (Pre = 1.73 ± 0.08 vs. Post = 1.67 ± 0.10, P = 0.69). Peak systolic blood pressure during the maximal treadmill exercise test was lower after exercise training (Pre = 186 ± 5 mmHg, Post = 174 ± 4 mmHg, P = 0.003) with no change after stretching (Pre = 190 ± 6 mmHg, Post = 190 ± 4 mmHg, P = 0.12). The rate of increase in systolic blood pressure during the V̇o_2peak test tended to decrease after training for both groups (-2 mmHg/stage) with no differences between groups (P = 0.97). There was no change in V̇o_2peak after either intervention. In conclusion, aerobic exercise training improves endothelial function and attenuates peak blood pressure reactivity during exercise in CKD.NEW & NOTEWORTHY Patients with chronic kidney disease (CKD) exhibit increased blood pressure reactivity during exercise that is associated with endothelial dysfunction. Twelve weeks of structured, aerobic, exercise training improves endothelial function and attenuates peak blood pressure responses during exercise in CKD stages III-IV.

Travel decision determinants during and after COVID-19: The role of tourist trust, travel constraints, and attitudinal factors

The COVID-19 pandemic has forced tourism practitioners to create efficient strategies to attract travelers. Using three theoretical frameworks, such as tourist trust (political, destination, and interactional trust), travel constraint (intrapersonal, interpersonal, and "social distancing" structural constraint), and extended theory of planned behavior (travel attitude, perceived behavioral control, subjective norm, perceived health risk, past travel experience), we develop a comprehensive framework to explain the impact of travel promoting, restricting, and attitudinal factors on travel decision during and after the pandemic. Data was obtained through an extensive survey conducted on 1451 Korean travelers and was analyzed using probabilistic choice models and count models. The results show the specific factors that determine travel decisions during the pandemic (whether to travel and frequency) and travel intention after the pandemic. This study provides important theoretical and practical insights into how to develop successful COVID-19 recovery strategies in the tourism industry.

Expert perspectives on priorities for supporting health security in the Pacific region through health systems strengthening

The COVID-19 pandemic has reiterated the interdependence of health security and health systems, and the need for resilient health systems to prevent large-scale impacts of infectious disease outbreaks and other acute public health events. Three years into the COVID-19 pandemic has led to discussions on how to "build back better", making it important to identify lessons to strengthen health systems and prevent future shocks from health security threats. Limited data exist on effective implementable initiatives, especially for the Pacific region. We explored the perceptions of a selection of experts with field experience in the Pacific region to identify and prioritise areas for future health system investments that strengthen health security. We conducted a qualitative cross-sectional study, collecting data using four focus group discussions. We analysed the data using a content analysis of notes recorded from each of the sessions. There were 24 participants, representing 15 research and academic institutions, nongovernment agencies, UN agencies and government as well as independent consultants. All were health sector stakeholders with field experience in the Pacific region and expertise in either health systems or health security. The analysis revealed four areas to prioritise future efforts, namely workforce development, risk communication, public health surveillance and laboratory capacity. A fifth theme, localisation, was identified as a cross cutting theme that should be applied to implementation of other identified priority areas. These findings provide a starting point to apply in practice this relatively new concept, of targeted health systems strengthening for health security development, in the Pacific. Evaluation of these initiatives will strengthen knowledge on the value of integrating these two concepts.

Examining Social Media Crisis Communication during Early COVID-19 from Public Health and News Media for Quality, Content, and Corresponding Public Sentiment

Rising COVID-19 cases in Canada in early 2021, coupled with pervasive mis- and disinformation, demonstrate the critical relationship between effective crisis communication, trust, and risk protective measure adherence by the public. Trust in crisis communication is affected by the communication's characteristics including transparency, timeliness, empathy, and clarity, as well as the source and communication channels used. Crisis communication occurs in a rhetorical arena where various actors, including public health, news media, and the public, are co-producing and responding to messages. Rhetorical arenas must be monitored to assess the acceptance of messaging. The quality and content of Canadian public health and news media crisis communication on Facebook were evaluated to understand the use of key guiding principles of effective crisis communication, the focus of the communication, and subsequent public emotional response to included posts. Four hundred and thirty-eight posts and 26,774 anonymized comments were collected and analyzed. Overall, the guiding principles for effective crisis communication were inconsistently applied and combined. A limited combination of guiding principles, especially those that demonstrate trustworthiness, was likely driving the negative sentiment uncovered in the comments. Public health and news media should use the guiding principles consistently to increase positive sentiment and build trust among followers.

How Does Risk-Information Communication Affect the Rebound of Online Public Opinion of Public Emergencies in China?

The rebound of online public opinion is an important driving force in inducing a secondary crisis in the case of public emergencies. Effective risk-information communication is an important means to manage online public opinion regarding emergencies. This paper employs fuzzy-set qualitative comparative analysis to discover which conditions are combined and may result in the rebound of online public opinion. Five conditions were selected: the type of public emergency, messengers, message attributes, audience, and information feedback. The study used a sample of 25 major public emergencies that occurred between 2015 and 2020 in China. The type of public emergency, audience, and information feedback emerged as critical influencing factors. Message attributes promote the rebound of online public opinion regarding public health emergencies, while messengers play a traction role in the rebound of online public opinion on other types of public emergencies. This study extends risk-information communication theory from the perspective of the type of emergency, explores the causes of rebounded online public opinion regarding public emergencies, and provides policies and suggestions for risk-information communication and online public-opinion governance during emergencies.