AC=dry air. Which means easy transmission. Plus it’s blowing around the building, duct work, etc.
Cool air gets returned and stays cool...virus multiplies vs. winter time part of the air returned gets heated hot enough to likely kill off some of the virus.
Bottom line is fresh air is your best friend.
I was funning the poster about a malapropism they used.
Makes sense. Now explain why New Mexico, Louisiana, Kansas and Oklahoma aren’t spiking way up.
Every state gets their peak. The peaking states will head down again soon.