Placebo-Unblinding Should Be Uniform Across COVID Vaccine Trials, Advisory Committee Says

US FDA’s outside advisors say Moderna should offer vaccine to placebo-arm patients when they are eligible, the same plan adopted for the Pfizer/BioNTech COVID-19 vaccine.

Vial with placebo medicine and syringe for injection
One of the principal investigators in Moderna's vaccine trial said drop-outs have increased since the Pfizer/BioNTech vaccine received an EUA. • Source: Screenshot

In their third discussion of the topic in two months, US FDA advisory committee members offered the agency their clearest direction on how coronavirus vaccine sponsors should handle placebo controls in clinical trials, although even supporters of the consensus choice acknowledged it was not ideal.

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