1. Epidemiological and clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a descriptive study;Chen N;Lancet,2020
2. Coronavirus disease (COVID-19) pandemic. Novel coronavirus (2019-nCoV) Situation Report - 52,2020
3. Painel de casos de doença pelo coronavírus 2019 (COVID-19) no Brasil
4. Trends in the prevalence of COVID-19 infection in Rio Grande do Sul, Brazil: repeated serological surveys;Hallal PC;Ciênc Saúde Coletiva,2020
5. Centro de Informações Estratégicas de Vigilância em Saúde de Pernambuco. Informe Epidemiológico nº 107/2020