Seroprevalence of anti-SARS-CoV-2 in patients with hepatitis B and C: a pre-vaccination study Lucas Lima da Silva; Lia Laura Lewis-Ximenez; Mônica de Avelar Figueiredo Mafra Magalhães; Vanessa Salete de Paula; Livia Melo Villar;

Hepatitis of unknown etiology in children in Brazil: A new challenge or the usual scenario ? Rodolfo Castro; Marcelo Ribeiro-Alves; Valdilea G. Veloso; Hugo Perazzo;

Serosurvey of anti-treponema pallidum (syphilis), anti-hepatitis C virus and anti-HIV antibodies in homeless persons of São Paulo city, southeastern Brazil Laís Giuliani Felipetto; Pedro Irineu Teider-Junior; Felipe Fortino Verdan da Silva; Anahi Chechia do Couto; Louise Bach Kmetiuk; Camila Marinelli Martins; Leila Sabrina Ullmann; Jorge Timenetsky; Andrea Pires dos Santos; Alexander Welker Biondo;