Case-fatality rates and risk of death from COVID-19 and influenza A/H3N2 in Brazil: A nationwide ecological study Paulo Ricardo Martins-Filho; Jerocílio Maciel de Oliveira Júnior; Cliomar Alves dos Santos;

Tachycardia following Pfizer-BioNTech COVID-19 vaccine Paulo Ricardo Martins-Filho;

Possible intrauterine transmission of SARS-CoV-2: Ultrasound findings and viral molecular detection in amniotic fluid Maria Carolina Andrade Maia; Carolina Santos Souza Tavares; Cliomar Alves dos Santos; Paulo Ricardo Martins-Filho;