The Best and Worst Materials for Face Masks

At the start of the pandemic, we were told not to wear masks because there was a legitimate concern that the limited supply of surgical masks and N95 respirators should be saved for the health care workers. UC San Francisco epidemiologist George Rutherford, MD, believes it was a mistake to tell the public not to use masks. “We should have told people to wear cloth masks right off the bat,” he said.Once the scientists started gathering more knowledge on...