How worried should vaccinated people be about breakthrough COVID infections? Here's what we know
Photo: Noam Galai/Getty Images Reports of vaccinated people being infected and sickened with the Delta variant of the coronavirus have multiplied in recent weeks, prompting anxiety and confusion over whether vaccines are as effective as they were advertised as well as whether fully vaccinated people need to take measures — like masking up again — to protect themselves.
But for the most part, as the Atlantic’s Kathryn J. Wu explains, a vaccinated immune system is up to the task: That being said, there is no official national count of breakthrough infections and no complete picture of just how often they are occurring. On the other hand, because breakthrough infections have so often made the news due to their novelty, that can create a perception of more cases than are actually happening — particularly without more robust tracking of the actual cases to provide context.
Why is it important to track breakthrough infections? Some scientists have criticized the CDC for not doing more to track breakthrough cases. In a recent interview with STAT News, Dr. Céline Gounder, an infectious disease expert at NYU’s Grossman School of Medicine, offered a succinct explanation of why having more data about these cases would be useful:
As to how much Delta is driving breakthrough infections, more data is needed, but the variant’s significantly higher transmissibility is undoubtedly having an impact. A variant that leads to more cases is inevitably going to mean more cases for the unvaccinated and vaccinated alike — though far more for the former.
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