Assessment of initial SARS-CoV-2 seroprevalence in the most affected districts in the municipality of São Paulo, Brazil Beatriz Helena Tess, Celso Francisco Hernandez Granato, Maria Cecília Goi Porto Alves, Maria Carolina Tostes Pintão, Marcia Cavallari Nunes, Edgar Gil Rizzatti, Fernando de Castro Reinach

Recent HIV infection rates among HIV positive patients seeking voluntary counseling and testing centers in the metropolitan region of Recife – PE, Brazil Ana Maria Salustiano Cavalcanti, Ana Maria de Brito, Daniela Medeiros Salustiano, Kledoaldo Oliveira de Lima, Sirleide Pereira da Silva, Heloisa Ramos Lacerda

Genotypes of Epstein–Barr virus (EBV1/EBV2) in individuals with infectious mononucleosis in the metropolitan area of Belém, Brazil, between 2005 and 2016 Talita Antonia Furtado Monteiro, Iran Barros Costa, Igor Brasil Costa, Thais Letícia dos Santos Corrêa, Beatriz Monteiro Rodrigues Coelho, Amanda Emanuelle Santos Silva, Francisco Lúzio de Paula Ramos, Arnaldo Jorge Martins Filho, José Luiz Furtado Monteiro, Jones Anderson Monteiro Siqueira, Yvone Benchimol Gabbay, Rita Catarina Medeiros Sousa