Even that was fairly pro mask: “When are they useful?

Studies done during the SARS epidemic of 2003 found that for medical professionals, wearing any type of mask compared with none can reduce chances of getting sick by about 80 per cent. The N95 mask, which gives better facial coverage and guards against smaller droplets, appears to be somewhat more effective than standard surgical masks. But medical professionals follow strict guidelines in taking masks on and off, discard them after each use, and use additional safeguards like eye protection and gowns to shield themselves. They can help to prevent sick individuals from transmitting the virus by blocking droplets.”

The real story wasn’t masks it was hand washing. Early on it was assumed surface contact would be a major vector, but that turned out not to be the case.

“Don’t think that masks are the miracle solution,” he said. “They are useful for those who are sick to not contaminate others. It’s all about hygiene of the hands.”