Flashback: Experts, media orgs said it was 'impossible' to develop a vaccine by the end of the year

On Friday, the U.S. Food and Drug Administration officially grantedPfizer's coronavirus vaccine emergency use authorization, kicking off a massive distribution plan that promises to inoculate millions of Americans by the year's end. On Monday, the first doses of the groundbreaking vaccine were administered at Long Island Jewish Medical Center in Queens, New York.

This is overwhelming good news and obviously a historic achievement for the United States, and yes, many thanks are owed to the Trump administration, which pushed the development of a vaccine into overdrive with Operation Warp Speed. But don't tell that to critics of the president, who vehemently discounted that a vaccine could be produced so quickly simply because it was President Trump who promised it.

For months, public health experts and legacy media organizations cautioned Americans that Trump's claims of a vaccine by the end of the year were "impossible."