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1:59
khou.com
How Pfizer's mRNA vaccine works in the body
Doctors say the vaccine contains no live virus, so experts said you can't get COVID-19 from the shot.
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A booster dose of the COVID-19 vaccine developed by Pfizer Inc and German partner BioNTech SE was 95.6% effective against the coronavirus when compared to a vaccinated group that did not get the third shot, data from a large study released by the companies showed on Thursday. The companies in a release said the booster was tested on 10,000 participants aged 16 and older who had received two doses in its earlier trials. A booster administered about 11 months after the second shot had a favourable
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