A federal advisory committee will meet for two days this week to discuss the safety and need for a booster shot for people who already received Moderna's or Johnson & Johnson's COVID-19 vaccine.
Members of the federal advisory panel, called the Vaccines and Related Biological Products Advisory Committee, also will hear data about the likely safety and effectiveness of giving people booster shots from a different vaccine manufacturer than their original doses.
While presumed safe, there has been little data so far and the government has encouraged people to stick with the same vaccine.
Booster doses of the Pfizer-BioNTech vaccine, which has been given to more than 230 million Americans since December, were approved last month for people over 65 as well as younger people whose medical conditions or jobs put them at higher risk for disease.
So far, people who received Moderna or J&J for their first round of shots have been told to sit tight.
