1. WHO - World Health Organization. WHO Coronavirus (COVID-19) Dashboard [site na Internet]. Disponível em: https://covid19.who.int/. Acessado em: 19/02/2022.

2. Costa SF, Giavina-Bianchi P, Buss L, Mesquita Peres CH, Rafael MM, Dos Santos LG. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Seroprevalence and Risk Factors Among Oligo/Asymptomatic Healthcare Workers: Estimating the Impact of Community Transmission. Clin Infect Dis. 2021;73(5):e1214-18.

3. Silva GAE, Jardim BC, Lotufo PA. Age-adjusted COVID-19 mortality in state capitals in different regions of Brazil. Cad Saude Publica. 2021;37(6):e00039221.

4. Our World in Data. Coronavirus (COVID-19) Vaccinations [site na Internet]. Disponível em: https://ourworldindata.org/covid-vaccinations. Acessado em: 19/02/2022.

5. Suzuki R, Yamasoba D, Kimura I, Wang L, Kishimoto M, Ito J, et al. Attenuated fusogenicity and pathogenicity of SARS-CoV-2 Omicron variant. Nature. 2022. doi: 10.1038/s41586-022-04462-1.

6. Meng B, Abdullahi A, Ferreira IATM, Goonawardane N , Saito A, Kimura I, et al. Altered TMPRSS2 usage by SARS-CoV-2 Omicron impacts tropism and fusogenicity. Nature. 2022. doi: 10.1038/s41586-022-04474-x.

7. Ferdinands JM, Rao S, Dixon BE, Mitchell PK, DeSilva MB, Irving SA, et al. Waning 2-Dose and 3-Dose Effectiveness of mRNA Vaccines Against COVID-19-Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance - VISION Network, 10 States, August 2021-January 2022. MMWR Morb Mortal Wkly Rep. 2022;71(7):255-63.

8. CDC - Centers for Disease Control and Prevention. Rates of COVID-19 Cases and Deaths by Vaccination Status [site na Internet]. Disponível em: https://covid.cdc.gov/covid-data-tracker/#rates-by-vaccine-status. Acessado em: 19/02/2022.