Covid-19: How long do vaccine protections last? Science can't say for sure

The gap in knowledge and testing raises the prospect of heightened anxiety in the coming months for vaccine recipients wondering if they're still protected

Protection from coronavirus vaccines is expected to wane, but no one knows when. It could be as soon as this fall for the first wave of people vaccinated last winter, and many predict that Covid boosters will soon join annual flu shots.
 

Ideally, anyone worried about fading vaccine protection could get tested for Covid-fighting antibodies, the primary defense against the virus. But as cancer patients and others with impaired immune systems are learning, it’s not that simple.
 

“The good news is, we have an antibody test that can test for whether or not you’ve made antibodies in response to the