CAMBRIDGE, MASSACHUSETTS - MAY 08: A view of Moderna headquarters on May 08, 2020 in Cambridge, Massachusetts. Moderna was given FDA approval to continue to phase 2 of Coronavirus (COVID-19) vaccine trials with 600 participants. (Photo by Maddie Meyer/Getty Images)

(AP) – Moderna says its experimental COVID-19 vaccine that combines its original shot with protection against the omicron variant appears to work. COVID-19 vaccine makers are studying updated boosters that might be offered in the fall. Moderna says its combination booster candidate increased omicron-fighting antibodies more than just giving another dose of the original. Today’s vaccines still offer strong protection against COVID-19 hospitalization and death but protection against milder infections wanes especially as the virus continues to mutate. Health authorities are considering whether to order a change in the vaccine recipe. Moderna announced its preliminary study results Wednesday.