“I really dont think this virus can be spread through HVAC systems. Measles can but it has an Ro of 12 or so.”
I hope you are right. I’ve seen opinions that go both ways. In any case, you can’t go to the grocery store without walking down hallways or entering elevators. Just trying to walk down the street without close contact is a chore in cities.
Measles can do bizarre things. It can create effective aerosols from dried scrapings. Thankfully it is largely just an annoyance to get. Anthrax does really strange stuff. They literally had a janitor change a light bulb in a room that had not been used for Anthrax research in decades. He got it.