Well I heard this on Brett Weinstein's podcast where he reviewed literature showing this to be the case, a couple weeks ago at least. No doubt related to UV which has shown to kill the virus.
I'm sure you're aware that positive news about the virus is generally being censoring by mainstream outlets, if you're wondering why you didn't hear about it.
I'm sure you're aware that positive news about the virus is generally being censoring by mainstream outlets, if you're wondering why you didn't hear about it.