With the National Football League season in the books, the league offered the use of NFL stadiums for mass Covid-19 vaccinations.

President Joe Biden said it will be difficult for the United States to reach herd immunity, at least 75% of the population inoculated against the coronavirus, by the end of the 2021 summer.

The U.S. Food and Drug Administration warned health care personnel not to make any changes to the dosing of Covid-19 vaccines and that doing so would place the public health at risk and undermine “the historic vaccination effort to protect the population.”

As Operation Warp Speed – the Trump administration’s program to develop and distribute a Covid-19 vaccine – struggles to ramp up vaccinations, one of the approaches under consideration is cutting the doses of the Moderna vaccine.

Former U.S. Food and Drug Administration Commissioner Scott Gottlieb criticized current FDA Commissioner Stephen Hahn’s comments to the Financial Times that he would potentially fast-track a Covid-19 vaccine before clinical trials are done if it was “appropriate.”