Hundreds of thousands of children under the age of 18 have been diagnosed with the disease.
The Trump administration missed a chance to send “public health tools to every person in the country,” critics contend.
“Mr. Barr needs a refresher course on the basics in U.S. history,” historian Gerald Horne said.
CDC head Robert Redfield explained there is “clear scientific evidence” that masks work to slow the spread of COVID.
One health model predicts COVID deaths could be cut in half if people wore masks regularly between now and December.
Robert Redfield stressed “we all got to” follow social distancing rules, including wearing masks, to take on COVID-19.
Some studies have demonstrated that hundreds of thousands of cases of COVID-19 were prevented thanks to masks.
Rep. Louie Gohmert had refused to wear a mask for months before contracting COVID-19.
Sources say Trump shifted his views after he saw charts showing spikes in states important for his reelection chances.
The poll also shows that close to 7-in-10 Americans disapprove of Trump’s COVID-19 response.