मंगलवार, 7 सितंबर 2021

Covid Vaccine Efficacy Numbers, Explained

Recent studies have shown that the effectiveness of Covid-19 vaccines is decreasing, though experts say the shots still work well. WSJ explains what the numbers mean and why they don’t tell the full story. Photo illustration: Jacob Reynolds/WSJ

from WSJ.com Video - Most Viewed WSJ Videos https://ift.tt/3jNm29s

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