The use of valved respirator N-95 masks is detrimental to the measures adopted for preventing the spread of coronavirus as it does not prevent the virus from escaping out of the mask.
 | New Delhi, Jul 20 (PTI): The Centre has written to all states and union territories warning against the use of N-95 masks with valved respirators by people, saying these do not prevent the virus from spreading out and are 'detrimental' to the measures adopted for its containment. The Director ... in.news.yahoo.com |