Is it worth putting a screen on th AC vents? I’d rather put a mask on a vent than wear one myself...
THEE ONLY thing that would be a sure thing for filtering out that bug is a military gas mask.
Air purifiers with HEPA filtration efficiently capture particles the size of (and far smaller than) the virus that causes COVID-19, and many readers have asked whether air purifiers can help protect against infection. The answer is yes, in theory, but as of July 2020, it remains unclear how much practical impact the machines could have.