COVID-19 Pandemic (Coronavirus)

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CNN)Drugmaker Pfizer said Thursday it is seeing waning immunity from its coronavirus vaccine and says it is picking up its efforts to develop a booster dose that will protect people from variants.

Pfizer said it would soon publish data about a third dose of vaccine and submit it to the US Food and Drug Administration, European Medicines Agency and other regulators. The company specified it would seek FDA emergency use authorization for a booster dose in August
 
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