It is people do not wear the correct masks. HAL is providing KN95 and they are the ones to be worn. Also, people do not wear their masks properly, wearing a mask on the chin, only on your mouth (nose not covered) does not help at all. Masks do help, having something to stop germs is better than spiling them in the air. If you sneeze without a mask you blow out germs all over. A mask stops a lot of these germs and a good masks would stop most of it... IMO, most people get contaminated at meals, when they remove masks.