I’m sure this has been posted, but I missed it: Does anyone have info. from a solid source on how much sunlight it takes to inactivate COVID-19 on a hard or impermeable surface? Obviously this will vary with sun angle and time of day, partial cloud cover, ambient temperature, etc.
I’d think the simultaneous drying action (under most circumstances) would be effective, too, so even a breeze might increase the beneficial effect?
Thanks!
(Does an exclamation mark after “thanks” make me dumber?)
I thought it was up to 4 minutes. This is a pesky, hardy bug.
Bringing this over, from another thread.
Som additional cures/trials, for CV, collection/info....h/t Captain7seas
Here is a bunch of information to digest in regards to “some kind of basis for a cure”.
https://www.youtube.com/watch?v=GQWSqHZZu1Y
https://www.youtube.com/watch?v=HXs5Xzr6qCI
https://www.clinicaltrials.gov/ct2/show/NCT04323514
https://isom.ca/wp-content/uploads/2020/03/IVAA-COVID19-Hospital-Use-Anderson-03.24.2020.pdf
https://jintensivecare.biomedcentral.com/articles/10.1186/s40560-020-0432-y
https://nypost.com/2020/03/24/new-york-hospitals-treating-coronavirus-patients-with-vitamin-c/
Aerosol and surface stability of HCoV-19 (SARS-CoV-2) compared to SARS-CoV-1
https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v1.full.pdf
Persistence of coronaviruses on inanimate surfaces and their inactivation with biocidal agents
March 2020
https://www.journalofhospitalinfection.com/article/S0195-6701(20)30046-3/fulltext
you didn’t ask about permeable, but this next link kind of goes with the nonpermeable stuff in that it highlights half-life.
half life on cardboard is about 3-1/2 hours and 3 days on plastics/steel:
https://www.benefitspro.com/2020/03/19/how-long-does-covid-19-live/?slreturn=20200302004844
although Forbes reports the half-life as:
around thirteen hours on steel and sixteen hours on plastic.
To kill germs, a very specific wavelength of ultraviolet light — 254 nanometers — is necessary. This particular type of ultraviolet light is produced by the Sun, but most of it is absorbed by the Earth’s atmosphere.
As a result, very little of it ever reaches Earth’s surface. That’s why the special industries mentioned above must use special ultraviolet lamps to produce it.”
https://wonderopolis.org/wonder/can-the-sun-help-to-kill-germs
however, wonderopolis also talks about solar water disinfection - where heat and UV act to disinfect water in 6 hours. I’d imagine that would work for anything in direct sun and low humidity all day. But would depend more on how hot the object got, as opposed to how ambient temp.