The Department of Homeland Security - 

Science and Technology Division recently announced:


In a simulation of midday summer solstice sunlight at midlatitudes (max UVB), coronavirus half-life in saliva droplets on nonporous surfaces (e.g.: stainless steel) is 1 to 2 minutes.


Each minute of UVB in our Blu Room is roughly equal to 3 minutes of the midday summer solstice UVB at midlatitudes (45 degrees North).  

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