Pfizer Inc. plans to ask U.S. regulators to authorize a booster dose of its COVID-19 vaccine within the next month, the drugmaker's top scientist said on Thursday, based on evidence of greater risk of reinfection six months after inoculation and the spread of the highly contagious delta variant.
source https://www.cbc.ca/news/world/pfizer-booster-u-s-f-d-a-1.6095891?cmp=rss
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