Decrease in reported cases of pertussis in Brazilian children: a reflection of social distancing and suspension of classes due to the Covid-19 pandemic. Research, Society and Development, [S. l.], v. 10, n. 11, p. e230101119631, 2021. DOI: 10.33448/rsd-v10i11.19631. Disponível em: https://rsdjournal.org/rsd/article/view/19631. Acesso em: 5 dec. 2025.