"Our most striking observation to date is the powerful effect solar light appears to have on killing the virus on both surfaces and in the air"
"It showed that the virus's half life -- the time taken for it to reduce to half its amount -- was 18 hours when the temperature was 70 to 75 degrees Fahrenheit (21 to 24 degrees Celsius) with 20 percent humidity on a non-porous surface.
This includes surfaces like door handles and stainless steel.
But the half-life dropped to six hours when humidity rose to 80 percent -- and just two minutes when sunlight was added to the equation.
When the virus was aerosolized -- meaning suspended in the air -- the half-life was one hour when the temperature was 70 to 75 degrees with 20 percent humidity.
In the presence of sunlight, this dropped to just one and a half minutes."
Not really surprising (nor new) re sunlight. It was being strongly promoted in 1918.