Moderna Or Pfizer Booster 2025. The updated mrna covid vaccines from moderna and pfizer are based on the kp.2 strain, one of the flirt variants that have been spreading since early spring. 22, the food and drug administration approved and authorized newer formulations of the two mrna vaccines, from pfizer/biontech and moderna, for ages 6.

Which vaccine is being offered? The vaccines come from makers such as pfizer and moderna.