Hospitality COVID-19: US CDC takes down warning on airborne spread of COVID-19 Updated : September 22, 2020 11:32 PM IST The World Health Organization (WHO) has said it is monitoring "emerging evidence" of possible airborne transmission. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.