Second COVID vaccine approved for use in the US

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Late Friday, the Food and Drug Administration issued an emergency authorization to a COVID-19 vaccine from a company called Moderna. The move follows an enthusiastic endorsement of the vaccine following an evaluation of clinical trial data by the FDA's Vaccines and Related Biological Products Advisory Committee. Moderna already has millions of doses prepared, and the federal government has pre-issued a large order for more, which will enable more extensive vaccinations than would be possible previously, where the agency had only issued an authorization to the Pfizer/BioNTech vaccine.

The authorization was considered to be a matter of time following the release of safety and efficacy data from a large clinical trial that had enrolled over 30,000 people. Emergency Use Authorizations require that a product or treatment meet a number of criteria, including the declaration of a medical emergency, which was done earlier this year, and the lack of an FDA approved alternative. (FDA approval is distinct from an Emergency Use Authorization, so the authorization of the Pfizer/BioNTech vaccine isn't a barrier to further authorizations.)

Beyond that, the product must be considered likely to be effective, and its potential benefits need to outweigh its potential risks. The votes from the members of the Vaccine Advisory Committee were unanimous that the benefits outweighed the risks, a conclusion that was well supported by the clinical trial data. That cleared the way for Friday's Authorization, which took place on a similar schedule to the authorization of the Pfizer/BioNTech vaccine the week prior.