US added a second COVID-19 vaccine to its arsenal Food and Drug Administration authorized an emergency rollout of the vaccine developed by Moderna Inc. And the National Institutes of Health. The move marks the world's first authorization for Moderna's shots. WASHINGTON: Moderna has become the second company to get emergency use authorisation for its anti-coronavirus vaccine from the US Food and Drug Administration (FDA), a week after the one developed by Pfizer received a similar approval. According to an official statement, the FDA has determined that the Moderna COVID-19 vaccine has met the statutory criteria for issuance of an emergency use authorisation (EUA).