Limited Secondary Transmission of SARS-CoV-2 in Child Care Programs - Rhode Island, June 1-July 31, 2020. - Link-Gelles R; DellaGrotta AL; Molina C; Clyne A; Campagna K; Lanzieri TM; Hast MA; Palipudi K; Dirlikov E; Bandy U (MMWR. Morbidity and mortality weekly report, 2020)