Breakthrough Cases Remain Uncommon

The Delta variant of the Covid-19 virus appears to be breaking through the protection vaccines provide at a higher rate than previous strains, though infections among the fully inoculated remain a tiny fraction of overall cases, and symptoms tend to be milder, the Wall Street Journal reports.

Said infectious disease expert Jorge Bernett: “All we’re really seeing, with vaccine breakthrough cases that come into the hospital, are people who are over 80 or have a compromised immune system.”