The CDC expects the updated shots to be effective at preventing severe COVID-19, even in the face of new variants.
Teka77/iStock via Getty Images Plus
Only time and data will tell whether the CDC-recommended reformulated shots can stand their ground against the ever-changing SARS-CoV-2 variants.
Researchers are working to develop vaccines that provide long-term immune protection from COVID-19.
Marko Geber/Digital Vision via Getty Images
Because COVID-19 is a relatively new virus, researchers still aren’t sure exactly how long vaccines and prior infections provide protection.
With a COVID-19 booster shot, vaccine effectiveness against hospitalization goes up to 90%.
FatCamera/E+ via Getty Images
Studies suggest seniors without the booster shot run a higher risk of infection and hospitalization from the omicron variant.