Don't Fear Breakthrough Cases

There is a lot of subtlety around "breakthrough" COVID cases as we struggle over the the definitions of "immunity" and "infection"

As more and more people get vaccinated, we were inevitably going to hear about some “breakthrough” cases of COVID in which a vaccinated individual nevertheless contracts the disease. The vaccine is, after all, 95% effective and that’s less than 100%.

But how do we square that efficacy rate with the fact that 8 or 9 vaccinated Yankees players tested posit…