During testimony before the Senate Committee on Health, Education, Labor and Pensions on Tuesday, Dr. Anthony Fauci stated he is “cautiously optimistic” that a COVID-19 vaccine candidate will get an efficacy signal, but said, “there’s no guarantee that the vaccine is actually going to be effective.”

“There’s no guarantee that the vaccine is actually going to be effective,” Fauci told the senators after being asked about the rapid development of a coronavirus vaccine.



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