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;

Comment on ¿Tachycardia following Pfizer-BioNTech COVID-19 vaccine¿ Rujittika Mungmunpuntipantip; Viroj Wiwanitkit;