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Article
Effectiveness of an inactivated Covid-19 vaccine with homologous and heterologous boosters against Omicron in Brazil
| Date Issued:
2022 | Copyright:
open access
Article
Effectiveness of the CoronaVac vaccine in older adults during a gamma variant associated epidemic of covid-19 in Brazil: test negative case-control study
| Date Issued:
2021 | Copyright:
open access