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;

Molecular investigation of occult hepatitis B virus infection in a reference center in Northern Brazil Suellen dos Reis Araújo; Andreza Pinheiro Malheiros; Vânia Pinto Sarmento; Heloisa Marceliano Nunes; Pedro Eduardo Bonfim Freitas;

Characteristics and outcomes of pregnant women with SARS-CoV-2 infection and other severe acute respiratory infections (SARI) in Brazil from January to November 2020 Lisiane F. Leal; Joanna Merckx; Deshayne B. Fell; Ricardo Kuchenbecker; Angelica E. Miranda; Wanderson K. de Oliveira; Robert William Platt; Lívia Antunes; Mariângela F. Silveira; Natália Bordin Barbieri;