Pfizer Claims Its Covid Vaccine Maybe 90% Effective: What does This mean? | NewsMo

People across the globe are eagerly waiting for the Covid vaccine. More than 150 coronavirus vaccines are in development across the world. But how does a vaccine get ready for use? What is the process they go through, Watch the video to know all about the vaccines

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Видео Pfizer Claims Its Covid Vaccine Maybe 90% Effective: What does This mean? | NewsMo канала India Today