Well OldMtWoman, this report came out yesterday afternoon: Coronavirus Can Stay In Air For 30 Minutes, Travel Twice ‘Safe Distance’ According To Study
https://www.zerohedge.com/health/coronavirus-can-stay-air-30-minutes-travel-twice-safe-distance-according-study
BUT! It is a study coming out of China, and it has yet to be vetted/peer reviewed. So, while it is supposedly conducted by epidemiologists, I would await for external verification.