Don’t Panic, But Breakthrough Cases May Be a Bigger Problem Than You’ve Been Told

The vaccines were never tested to prevent transmission, only symptomatic disease, and those who knew the science expected, from the outset, that we would see some number of such cases, and that they would be, overwhelmingly, mild. But Delta appears to have changed things […] and during the current surge there does seem to be considerably more “leakage” in the protection that vaccines offer against pandemic spread than has widely been acknowledged.

Don’t Panic, But Breakthrough Cases May Be a Bigger Issue Than You’ve Been Told

The vaccines work very well, but current public-health communications may be understating the frequency of infections among the vaccinated.