Pagotto V, Soriano M, Giunta DH, Figar S. Survey of infection by severe acute respiratory syndrome coronavirus 2 (sars-cov-2), community level in inhabitants of a marginal urban neighborhood of the city of buenos aires: an example of a probability sampling. Rev Hosp Ital B.Aires. 2020;40(4):233-236. doi:10.51987/revhospitalbaires.v40i4.43