A new model for chronic diseases

SARS-CoV-2-The Role of Natural Immunity: A Narrative Review

BACKGROUND

Both natural immunity and vaccine-induced immunity to COVID-19 may be useful to reduce the mortality/morbidity of this disease, but still a lot of controversy exists.

AIMS

This narrative review analyzes the literature regarding these two immunitary processes and more specifically: (a) the duration of natural immunity; (b) cellular immunity; (c) cross-reactivity; (d) the duration of post-vaccination immune protection; (e) the probability of reinfection and its clinical manifestations in the recovered patients; (f) the comparisons between vaccinated and unvaccinated as to the possible reinfections; (g) the role of hybrid immunity; (h) the effectiveness of natural and vaccine-induced immunity against Omicron variant; (i) the comparative incidence of adverse effects after vaccination in recovered individuals vs. COVID-19-naïve subjects.

MATERIAL AND METHODS

through multiple search engines we investigated COVID-19 literature related to the aims of the review, published since April 2020 through July 2022, including also the previous articles pertinent to the investigated topics.

RESULTS

nearly 900 studies were collected, and 246 pertinent articles were included. It was highlighted that the vast majority of the individuals after suffering from COVID-19 develop a natural immunity both of cell-mediated and humoral type, which is effective over time and provides protection against both reinfection and serious illness. Vaccine-induced immunity was shown to decay faster than natural immunity. In general, the severity of the symptoms of reinfection is significantly lower than in the primary infection, with a lower degree of hospitalizations (0.06%) and an extremely low mortality.

CONCLUSIONS

this extensive narrative review regarding a vast number of articles highlighted the valuable protection induced by the natural immunity after COVID-19, which seems comparable or superior to the one induced by anti-SARS-CoV-2 vaccination. Consequently, vaccination of the unvaccinated COVID-19-recovered subjects may not be indicated. Further research is needed in order to: (a) measure the durability of immunity over time; (b) evaluate both the impacts of Omicron BA.5 on vaccinated and healed subjects and the role of hybrid immunity.

Construct Validity and Reliability of the Chinese Version Personal Adjustment and Role Skills Scale III for Adolescents With Chronic Disease

PURPOSE

A valid and reliable scale to evaluate psychosocial adjustment in adolescents with chronic disease is prudent for improving their health outcome. This study aimed to develop a Chinese version Personal Adjustment and Role Skills Scale III for Adolescents (C-PARSIII-A) with chronic disease and to examine its construct validity and reliability.

DESIGN AND METHODS

A cross-sectional design was conducted. A total of 145 participants were enrolled from a hospital in Taiwan. Content validity, exploratory factor analysis, and corrected item-total correlations were used to explore a factor structure with appropriate items in a C-PARSIII-A. Confirmatory factor analysis was conducted to confirm its factor structure. Cronbach's α and test-retest reliability were performed to examine the reliability.

RESULTS

The 18-item C-PARSIII-A with six inter-correlated factors was developed. The standardized factor loadings of each item on its corresponding factor were statistically significant and higher than 0.50; composite reliability and average variance extracted were higher than 0.70 and 0.50 respectively. The correlation coefficients among the six factors in the C-PARSIII-A ranged from 0.10 to 0.84. Cronbach α and test-retest reliability of the C-PARSIII-A were 0.86 and 0.92 respectively.

CONCLUSIONS

The six-factor 18-item C-PARSIII-A is supported by sufficient empirical evidence for construct validity and reliability to assess the psychosocial adjustment of adolescents with chronic disease.

PRACTICE IMPLICATIONS

Nurses can use the C-PARSIII-A to perform assessment and follow-up on the psychosocial adjustment of adolescents with chronic disease, as well as develop interventions.