FILE PHOTO: An employee holds a vial containing CoronaVac, Sinovac Biotech’s vaccine against the coronavirus disease (COVID-19), at Butantan biomedical production center in Sao Paulo,
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FILE PHOTO: An employee holds a vial containing CoronaVac, Sinovac Biotech’s vaccine against the coronavirus disease (COVID-19), at Butantan biomedical production center in Sao Paulo,
Read moreThe Chinese CoronaVac jab, a key tool in Brazil’s fight against COVID-19, is less effective against the Gamma variant first detected in the virus-ravaged South
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