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What ‘Breakthrough’ Covid Means for Vaccinated People: QuickTake

July 22, 2021, 1:39 AM

With Covid-19 shots reaching billions of people, reports have grown more common of people getting infected with the coronavirus despite being vaccinated. Just as a natural infection doesn’t guarantee protection from reinfection with the virus, neither does immunization provide a perfect shield. Still, those who have immunity -- either from vaccination or infection -- carry a fraction of the risk of those who have none. So-called breakthrough cases among the immunized are a reminder that as long as the pandemic virus is prevalent in the world, it remains a threat to everyone.

1. Why are vaccinated people testing positive ...

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