How concerned should we be about breakthrough coronavirus infections? One expert weighs in
In the past week, you may have heard about Olympic athletes who are fully vaccinated getting positive Covid tests or people in Provincetown, Mass., or Texas Democrats or the New York Yankees. These are called breakthrough infections, and they’re causing a lot of anxiety about whether the vaccines hold up against the hyper-transmissible Delta variant.
But how concerning are they? And as cases are surging across the country, how much do they matter as a metric of the pandemic when we have a vaccine to protect against severe disease?
