That’s like asking why we can’t just eliminate gonorrhea… people keep inoculating each other with the bad shit.

I do tell my expecting parents (who happen to have bad teeth) that they should not test the food in their mouth and use the same spoon with their new child, as they will be passing on their bacteria to the kid. I do also imply they shouldn’t share things like drinks.

Whether or not they listen to me isn’t my problem…

The 3m 6035 filter only has a replacement schedule for infection control reasons, implying the outside may become too contaminated.

It was the original pandemic filter (there is a model up that does organic vapours too), marketed as being used for at least one pandemic wave.

No filter will last 10 years of daily use, at some point even your washable car filters or cleanable air purifier filters clog up and break down. But these are very long lasting for what they do, and I can see someone being able to stretch them out to one every six months, if in a hospital setting.