Editors Please note: Script was resent to change headline from 'Optimistic' for vaccine by end of year into 2021: Fauci - changed to "Fauci
Fauci addressed concerns that the vaccine trials were moving too fast.
"I know to some people this seems like it is so fast that there might be compromising of safety and scientific integrity, I can tell you that's absolutely not the case," he said.
He added that FDA commissioner 'assured' him that the decision to approve a vaccine would be based on data 'proving the safety and efficacy'. Fauci urged Americans to take the vaccine when one comes available.