New #China study shows #COVIDー19 can spread more readily in certain conditions. Hunan province researchers found virus in air-con bus:
-traveled 4.5m (15 ft) 2x official “safe distance”
-stayed in air for 30min
Advice is masks in enclosed spaces @WHO @ScottGottliebMD @megtirrell pic.twitter.com/Wa6ciwpMw5

— Eunice Yoon (@onlyyoontv) March 9, 2020