How common are breakthrough infections?

As the Delta variant continues to dominate COVID-19 infections in the U.S., so-called breakthrough cases have gained more attention. These stories are in the news, our social media feeds and in the minds of many of those who got inoculated. But how common are they?

Dr. Monica Gandhi, an infectious disease specialist and professor of medicine at the University of California, San Francisco, discusses the chances of getting a breakthrough infection, and who is more likely to be affected.

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