Besides a percentage of injected kids, and besides their being around shedding adults, we've been around parents whose school-attending kids are having high amounts of respiratory and sinus infections.
After some poking around, we found that one school had suffered a pipe burst during plandemic shutdown, and lots of kids and staff have been having issues. I believe they will find mold eventually. I also believe from another parents' talk with operations personnel that the HVAC units have not been cared for, run, ducts cleaned out or had timely filter changes.
(Just another reason to homeschool) But- if your kids or others are getting sick, push for answers and do what you have to so they're safe.
I've always wondered this. Back when I was in school in the 60s and 70s, without fail, the first 2-3 weeks following summer vacation I'd be sick with "something" causing terrible congestion, coughing, and in general feeling lousy. At the time, I attributed it to "getting used" to the germs again from other students, but, honestly, does an absence of 10 weeks really make that much difference?
Now, I wonder if the janitorial staff was using chemicals to deep clean the schools during the summer, and I was actually reacting to some sort of toxic chemical? Who knows what they might have been using back then. Hmmmmm....
Yes, I would put that as a strong possibility, and don't forget pesticides and poisons. I've also seen schools shut down due to leaky asbestos insulation.
I grew up in the humid South, and if a school wasn't used at all in the summer, morons would shut down the AC units to save money. Mold would get in and then they'd surface clean, never getting into the deeper stuff that inhabited the ducts and walls.
Administrators were always more political than practical.