RIO DE JANEIRO, BRAZIL - The Brazilian Health Regulatory Agency (ANVISA) has sent State Secretariats an alert about the potential adulteration of CoronaVac vaccines, used in the immunization against Covid-19.
Since May, ANVISA has been investigating a possible case of falsification that occurred in Maranhão. According to the investigation, an empty vaccine vial was reused for the introduction of an unknown liquid. A tampered seal was also used.
As a safety measure, the agency recommended that health professionals assigned to administer vaccines should check that the vials received by the Butantan Institute are intact.
In addition, empty vials should . . .
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