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Pfizer-BioNTech shot could help end pandemic, Israel study shows
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Transmission PreventionAfter two doses, the vaccine was just as effective for adults age 70 and older as it was for younger people.
There were indications that the shot might work slightly less well for people who were sick with three or more other illnesses, such as high blood pressure and diabetes.
But the benefit remained strong, with 89% protection from Covid symptoms seven days after the second dose.And for most people, protection was already significant two to three weeks after the first dose.The results were also positive for another closely-watched feature: prevention of transmission.
Though the research team noted that the study wasn’t designed to study transmission, because participants weren’t proactively tested, there did seem.
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COVID-19
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