PAHO Director, Dr Carissa Etienne, calls for “extreme caution” when transitioning to more flexible social distancing measures.

There is no evidence that oral poliovirus vaccine protects people against infection with COVID-19 virus. A clinical trial is planned in the USA, and WHO will evaluate the evidence when it is available. 

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There is no evidence that the Bacille Calmette-Guérin vaccine (BCG) protects people against infection with COVID-19 virus. Two clinical trials addressing this question are underway, and WHO will evaluate the evidence when it is available. In the absence of evidence, WHO does not recommend BCG vaccination for the prevention of COVID-19.