A mosquito in a cage in Curitiba, Brazil on March 19, 2026. Nelson Almeida/AFP via Getty ImagesBrazil has suspended a vaccination campaign after two people died.The campaign for the dengue vaccine—the world’s first single-dose vaccine—has been halted as authorities investigate deaths and other cases with “warning signs” such as persistent vomiting, Brazil’s Ministry of Health said in a June 8 statement.
Brazil Suspends Dengue Vaccine Campaign After Deaths
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