Biden questions whether coronavirus vaccine will be 'real,' despite experts' assurances

Joe Biden is preemptively doubting whether a coronavirus vaccine will be "real," and has cast doubt on whether the vaccine would be distributed with "any degree of equity and realization" -- seemingly contradicting public health experts even as the White House touts vaccine progress.

The Trump campaign has called out Biden's remarks as "irresponsible," pointing to statements by top National Institutes of Health (NIH) officials promising an effective vaccine.

“How are you going to distribute the vaccine when it arrives, when it arrives, when it’s there?" Biden asked Tuesday. "And the question of whether it’s real, when it’s there, that requires enormous transparency. You got to make all of it available to other experts across the nation, so they can look and see. So there’s consensus, this is a safe vaccine.

"Because already you have, what percent is American people saying if the vaccine were there tomorrow, they wouldn’t take it? And it’s not the usual anti-vaccine crowd. It’s beyond that because people are losing faith in what the president says. Think about it."

Meanwhile, the chief adviser of Operation Warp Speed, the government's vaccine program, said this week in an interview with CNN that he expects efficacy rates "in the 90 percent" range.