Transitions between Housing States among Urban Homeless Adults: a Bayesian Markov Model

Seroprevalence of SARS-CoV-2 antibodies among homeless people living rough, in shelters and squats: A large population-based study in France

Background

Overcrowded housing, as well as inadequate sanitary conditions, contribute to making homeless people particularly vulnerable to the SARS-CoV-2 infection. We aimed to assess the seroprevalence of the SARS-CoV-2 infection among people experiencing homelessness on a large city-wide scale in Marseille, France, taking into account different types of accommodation.

Methods

A consortium of outreach teams in 48 different locations including streets, slums, squats, emergency or transitional shelters and drop-in centres participated in the inclusion process. All participants consented to have a validated rapid antibody assay for immunoglobulins M (IgM) and G (IgG) and to answer a questionnaire on medical health conditions, comorbidities, and previous COVID-19 symptoms. Information on their housing conditions since the COVID-19 crisis was also collected from the participants.

Results

From June 01 to August 05, 2020, 1,156 homeless participants were enrolled in the study and tested. The overall seroprevalence of SARS-CoV-2 IgG/IgM antibodies was 5.6% (95%CI 2.3–7.0), ranging from 2.2% in people living on the streets to 8.1% in people living in emergency shelters (P = 0.009). Around one third of the seropositive participants reported COVID-19 symptoms. Compared to the general population in Marseille (3.6%), the homeless population living in the same urban area experienced a significantly increased risk of SARS-CoV-2 infection (|z| = 3.65 > 1.96).

Conclusion

These findings highlight the need for regular screening among the homeless to prevent clustering in overcrowded or inadequate accommodations. It is also necessary to provide essential resources to keep homeless people healthy, the vast majority of whom have cumulative risk factors for SARS-CoV-2 infection.

Advocates Make a Difference in Duration of Homelessness and Quality of Life

Social support is known to protect against homelessness and improve the wellbeing of people experiencing homelessness, but the role of professional versus informal advocates has not been studied in relation to the duration of homelessness and quality of life. We measured the effect of the presence and quality of formal (professional) and informal (family or friend) advocates on these outcomes. Our team interviewed 67 adults experiencing homelessness at tiny house villages and self-organized encampments in Seattle/King County, Washington in 2018-2019. The duration of homelessness was 19.6 months shorter for those with a high-quality informal advocate, compared to those without, while controlling for race, age, gender, and sexuality. However, this difference did not reach statistical significance at the alpha 0.05 level (p = .069). Additionally, those with high-quality informal advocates had 5.3 times the odds (p = .010) of reporting high quality of life compared to those without. The effect of at least one high-quality, professional advocate was insignificant in our model. Our results suggest social workers and other professional advocates integrate methods that strengthen clients' informal relationships into their practice.