Do vaccinated people spread Covid as much as unvaccinated people?

Denominators (still) matter

A couple of weeks ago, internal CDC data about the Delta variant leaked to the public. There was a lot to process in this tranche of data—like, for example, the fact that Delta is way more transmissible than the original version of Covid-19.

Perhaps predictably, however, the anti-vaccine movement has latched on to one particular finding: the amount of virus (aka the “viral load”) in the noses of infected vaccinated people mimics the viral load in…

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Mark Shrime, MD, PhD

Mark Shrime, MD, PhD

Author, SOLVING FOR WHY | Global surgeon | Decision analyst | Climber | 3x American Ninja Warrior Competitor