European drug regulator approves Pfizer booster for 18-plus
The European Medicines Agency is recommending that, for people with severely weakened immune systems, the Pfizer and Moderna boosters can be administered at least 28 days after the second dose.
For people with normal immune systems, the Pfizer booster is approved for people 18 and older due to data showing a rise in antibody levels when a Pfizer booster dose is given about six months after the second dose. (Data for Moderna for those with normal immune systems is still being evaluated).
-ABC News' Christine Theodorou