An influential U.S. advisory panel is set to discuss expanding eligibility for COVID-19 booster shots to all adults around the world Friday. 

If approved by the FDA and the CDC, this would mean anyone over the age of 18 will be able to get the Pfizer COVID-19 booster shot, regardless of health status. 

Last week, Pfizer asked the FDA to formally approve its recommendation that any adult in the U.S. be eligible to get the shot, that is any adult who wants the vaccine and is at least six months past their initial vaccination date. 

Some states have already made the Pfizer booster available to adults, ahead of the CDC and FDA’s approval. 

If Pfizer’s plan gets approved, the CDC wants everyone to know that it is OK to mix the vaccine brands, but that they do suggest that Pfizer and Moderna vaccine would be more protective than a second J&J shot.