COVID-19 in health care workers in a university hospital during the quarantine in São Paulo city Klinger Soares Faíco-Filho; Joseane Mayara Almeida Carvalho; Danielle Dias Conte; Luciano Kleber de Souza Luna; Nancy Bellei;

SARS-CoV-2 sublineages recovered from southern Brazilian cases during Omicron wave in 2023, early introduction of JN.1 Mellanie Fontes-Dutra; Micheli Filippi; Meriane Demoliner; Alexandre Sita; Fernando Rosado Spilki;

COVID-19 hospitalization in vaccinated and non-vaccinated patients: Clinical profile and outcomes Laura Holtman-Ferreira; Elessandra de Souza Bitencourt; Betina Mendez de Alcantara Gabardo; Susanne Edinger Pereira; Francine Teixeira; Diego da Silva Magatão; Vitor Loureiro Dias; Ricardo Petterle; Meri Bordignon Nogueira; Sonia Mara Raboni;