Medical researches completed in Hong Kong and China there masks are in use for continuous period by many persons show serious grow of pulmonary deceases. Major factor of them was of course air quality, but some scientists found direct link between mask usage and health problems. Some of factors they pointed out were lower oxygen level and self contamination. Yes, medical personal including surgeons wear their mask for long period of time, but they are absolutely disinfected or single use. Even most of world armies with highly trained contingent do not allow to wear protective equipment for longer than 2 hours period.

We should expect serious increase of lung deceases if current policy will be enforced. The only way to avoid such future is single use masks, but it is technically impossible especially for poor people. They do not have money to buy them with each public visit.