Anthony Fauci, a top federal health expert, has warned that rolling out a coronavirus vaccine under an emergency approval could make testing for other immunizations “impossible,” arguing it might rob the trials of participants.

Fauci, the director of the National Institute of Allergy and Infectious Diseases, told Reuters in an interview on Monday that a vaccine should not be given an emergency use authorization (EUA) “before you have a signal of efficacy,” saying it could jeopardize the other various vaccines under testing.

“One of the potential dangers if you prematurely let a vaccine out is that it would make it difficult, if not impossible, for the other vaccines to enroll people in their trial,” Fauci said, adding that before granting approval it is “absolutely paramount” to “definitively show that a vaccine is safe and effective.”



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