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so you are saying that Fauci was wrong telling the whole country that mask does not help back in March?"The bottom line is that any mask that covers the nose and mouth will be of benefit."
“The concept is risk reduction rather than absolute prevention,” said Chin-Hong. “You don’t throw up your hands if you think a mask is not 100 percent effective. That’s silly. Nobody’s taking a cholesterol medicine because they’re going to prevent a heart attack 100 percent of the time, but you’re reducing your risk substantially.”
Still Confused About Masks? Here’s the Science Behind How Face Masks Prevent Coronavirus
We talked to UCSF epidemiologist George Rutherford, MD, and infectious disease specialist Peter Chin-Hong, MD, about the CDC’s reversal on mask-wearing, the current science on how masks work, and what to consider when choosing a mask.www.ucsf.edu