Health

I agree that they have been falsely advertised/hyped with eliminating--especially with COVID-19, which is pretty ludicrous with respect to any respiratory virus for a simple household air filter system.

With far more filtration than these could ever provide and dilution with massive amounts of piped-in fresh air (and negative pressure to prevent viral escape to other areas of the home as we do to contain TB), a case could be made that the premise is not ridiculous. But not with a simple HEPA household filter system. But, it is not true that they cannot be of value for those with allergies and asthma, which is what they were originally designed for.