Pfizer is expected to seek authorization from the Food and Drug Administration for its vaccine booster shot for those who are ages 16 and 17, a source familiar with the plan tells CNN.
Currently only those age 18 and up are eligible for booster shots six months after their second dose of the Pfizer vaccine.
The development comes as scientists in the US and around the world are racing to learn more about a new variant named Omicron.
On Monday, President Biden urged Americans to pay attention, but not to panic. He also encouraged those who have not yet gotten a booster but are eligible to do so.
Biden had hoped to have boosters made widely available months ago, but the move ultimately didn't happen until late November. Asked Monday if making vaccines available to everyone sooner could have helped with the current dynamic, White House press secretary Jen Psaki referred the question to medical experts.
Pfizer didn't immediately respond to CNN's request for comment.