Ultraviolet light "arches" would be an excellent idea!! Please note photograph in article which shows an "archway" with sanitizing spray - why not use ultraviolet light instead of a spray? Seems like this would work & can be placed around the cities & in building entry ways. From Al Arabiya: Coronavirus: Saudi Arabia sets up self-sanitization gates in Mecca’s Grand Mosque Before anyone enters the mosque’s courtyards, they must pass through the gate which sterilizes them from head to toe using a sanitizing spray. https://english.alarabiya.net/en/coronavirus/2020/05/07/Coronavirus-Saudi-Arabia-sets-up-self-sanitization-gates-in-Mecca-s-Grand-Mosque.html?utm_source=insider&utm_medium=web_push&utm_campaign=en_mecca_clean_sa&webPushId=MTM4MjM=