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Scientist who helped develop Pfizer-BioNTech Covid vaccine agrees third injection is needed as immunity wanes

Pfizer identifies fake Covid-19 shots abroad as criminals abusing vaccine demand

Europe should take the Sputnik vaccine amid ‘Pfizer monopoly’: RDIF

Half of American adults have received at least one injection of Covid vaccine

China plans to approve the first foreign Covid-19 vaccine by July

Annual Covid-19 vaccine booster shots likely to be needed, says Pfizer’s CEO

Blood clots are more likely after Covid-19 than after vaccination, research shows

Moderna hopes to have a booster shot ready by the fall, CEO says

5 things to know before the stock market opens Monday, April 12

Top official admits that effectiveness is low