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;

No evidence of an increased risk for cardiac complications following mRNA COVID-19 vaccines Paulo Ricardo Martins-Filho; Antônio Carlos Sobral Sousa;

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