Breakthrough infections — in which vaccinated people nonetheless get the Covid-19 virus — are one of those vexing topics that can be difficult to put in perspective.
On the one hand, breakthrough infections are obviously occurring. They’ve happened to the New York Yankees and to White House officials, as well at summer gatherings in Massachusetts, Oklahoma and elsewhere. My colleague Liam Stack recently got sick with a breakthrough infection (and I’ll tell you his story below).
On the other hand, the scale of breakthrough infections remains unclear. Are they a significant reason that cases are now surging in the U.S.