Booster shots recommended for all

The United States will be rolling out booster shots from September 20 for all persons who have previously been fully vaccinated against COVID-19. Though the vaccines are still protecting people from developing serious symptoms, new data shows that their effectiveness wanes over time.

This is far from an unexpected outcome. It’s common for a person’s antibody levels to decline over time after a vaccine is first administered, and that appears to be exactly what’s happening with the COVID-19 shots.

“Even though this new data affirms that vaccine protection remains high against the worst outcomes...