CDC says Americans should wear masks in public The evidence concerning how effective homemade masks are effective in preventing the spread of the novel coronavirus is “inconclusive,” and more research is needed, doctors on an infectious diseases panel within the National Academies of Sciences, Engineering and Medicine told the White House in a letter Wednesday.  The research memo, requested by the White House, comes as the Centers for Disease Control recommends that Americans wear non-surgical face masks, including homemade masks, out in public, a measure meant more to prevent unknowingly infected individuals from spreading the virus than to keep healthy people who wear masks from becoming infected. There is little research on the effectiveness of homemade masks, doctors on the Standing Committee on Emerging Infectious Diseases and 21st Century Health Threats told the White House Office of Science and Technology Policy. And the limited laboratory testing that has been done shows homemade masks are not nearly as effective as medical-grade masks.  The committee, which has been providing rapid-response research on coronavirus at the White House’s request, was asked to look at whether homemade face coverings can prevent infected people who are asymptomatic or pre-symptomatic from spreading the disease. Dr. Rich Besser, one of


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