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(PDF) Face Masks Against COVID-19: An Evidence Review

May 14, 2020 · was reduced by 88% when wearing a surgical mask compared with no mask (95% condence interv al [CI], 81-96%; P=0.03). W o od et al ( 34 ) found for their 14 cystic brosis patientsWearing a face mask: Day-to-day questions & problems of wearing time range f90 surgical mask in germanyWearing a face mask is now de rigueur in Germany. But this goes hand in hand with a wide range of problems and questions on their use. As high-risk patients, anyone with chronic respiratory disease has to be especially careful to protect themselves from coronavirus.

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