Objective: To assess the association of family and housing characteristics with the number of seropositive cases to SARS-CoV-2 in households.
Materials and methods: We analyzed 874 households from Encuesta Nacional de Salud y Nutrición (Ensanut) 2020 Covid-19 using Poisson regression models.
Results: The number of seropositive family members was higher among families composed of children/adolescents, adults and older adults, households with more than two members per bedroom, and among households with closed windows. No association was found for bathroom availability and piped water.
Conclusions: Family composition and housing characteristics can impose significant structural barriers to safe home confinement.