Seroprevalence of hepatitis E virus infection in blood donors from Piauí State, Northeast Brazil João Paulo da Silva-Sampaio; Raniela Borges Sinimbu; Julia Trece Marques; Abilio Francisco de Oliveira Neto; Livia Melo Villar;

Hepatitis E virus infection among patients with altered levels of alanine aminotransferase Danielle Dias Conte; Luciano Kleber de Souza Luna; Amanda Passarini; Vitória Rodrigues Guimarães Alves; Debora Bellini Caldeira; Jessica Santiago Cruz; Viviane Almeida Gouveia; Nancy Bellei; Celso F.H. Granato;

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;