The race between Moderna and Pfizer to gain FDA nods for their COVID-19 vaccines as boosters in all adults has ended in a dead heat.
On Friday morning, the FDA simultaneously expanded emergency use authorizations for both mRNA vaccines to be used as boosters in adults 18 and older.
The regulator ruled that those who have been vaccinated with any FDA-authorized shot are eligible for either booster. The dose can be administered no sooner than six months after completion of the primary vaccination series. Those who received the single-dose Johnson & Johnson vaccine are eligible for a booster dose of any of the vaccines after two months.