Pfizer Says Its Covid Vaccine Works Against Key Mutation

It’s good news, but experts cautioned that the new variants from Britain and South Africa also carry other potentially dangerous mutations that have not yet been investigated.

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Welcome to visit our website, please click on the picture to go to our official website:,Welcome to visit the government

Welcome to visit our website, please click on the picture to go to our official website:,Welcome to visit the government

Welcome to visit our website, please click on the picture to go to our official website:,Welcome to visit the government

Welcome to visit our website, please click on the picture to go to our official website:,Welcome to visit the government