COVID-19: por que é importante tomar a segunda dose da vacina?

Referências: VICTORIA, C., CASTRO, M. C., GURZENDA, S., BARROS A. J. D. Estimating the early impact of vaccination against COVID-19 on deaths among elderly people in Brazil: analyses of routinely-collected data on vaccine coverage and mortality. International Center for Equity in Health, Universidade Federal de Pelotas, RS, Brazil. Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, USA. Abr. 2021. doi: https://doi.org/10.1101/2021.04.27.21256187