We do quite a bit of Coronavirus remediation, using the Clorox360 electrostatic disinfectant applicator on furniture, fixtures, touchpoints, etc., so my focus tends to be on how you can catch the disease by touching contaminated surfaces. But, to be honest, one is much more likely to catch the virus by breathing air that a sufferer has exhaled than by touching something he has touched.
A key is air circulation. Good air circulation dilutes the virus; one needs to inhale from several hundred to several thousand (depending on who is estimating) viruses to get sick; the more diluted the air has become since it was exhaled, the fewer viruses it hosts. That's why being outdoors is a very good idea, as are not standing too close to the sufferer, or for too long.
Good AC duct design helps with that circulation; a remodeled building or suite without adequate re-ducting can create a host of problems. Physically, the issue is the same indoor air quality issue that it has always been; here's a bit from the EPA on that subject. Our emphasis in providing commercial janitorial service has long been health: HEPA filtered vacuums, lots of microfiber technology, careful chemical selection, all to improve client's air quality. So we tend to keep on top of the science, and of industry advances.
But, should you have a co-worker become infected, we can certainly take care of disinfecting surfaces throughout the impacted area. Best to move fast.
And probably best to not inhale much of the air he was using.
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