The role of children in household transmission of SARS-CoV-2 across four waves of the pandemic.

In this community, children were significantly less infectious to their household contacts than adolescents or adults. Most children were infected by a symptomatic adult, usually their mother. There was a double benefit of vaccination as it protected the vaccinee from severe illness and prevented onward transmission to household contacts. Our findings may also be valid for similar populations throughout Latin America.