Masks are not ineffective to reduce transmission of COVID

March 2021 Study on mask efficacy found that masks are ineffective at reducing transmission and infectivity. Wearing mast has adverse physiological/psychological effects. Long term consequences on health are detrimental. WHO & UNICEF say children under 5 should not wear mask. Ages 12-adult should wear a mask only if there is widespread transmission in the area, cannot maintain 3' distance or are vulnerable to the virus.