With nearly 200,000 American deaths attributed to the coronavirus pandemic, a leading public health researcher said it will be well into 2021 before life will be "meaningfully better" in parts of the United States, and disputed President Donald Trump's recent public assertions that we are "rounding a corner" on acquiring a vaccine.

Ashish Jha, dean of Brown University's School of Public Health, said he agrees with Dr.

"I think we're going to have some very hard months ahead.

Co-host Anthony Mason asked, "The CEO of Pfizer, who was on 'Face the Nation,' said there's more than a 60% chance the company will know by the end of October whether its vaccine works.

"One of the things that I have called for, and others have called for, is that vaccine manufacturers should absolutely make their protocols and their research and their statistical plans all public so we can understand what's motivating him to say that, what's underlying the assessment.

Jha said, "We're going to have to make hundreds of millions of doses.

"Why do you think it's so important that they are transparent and let us know all the details, and why wouldn't they let us know the details?".

And therefore, given how much attention we're all paying, I think it's critical for the investigators to make all of this stuff completely public."