Most childhood illnesses are not picked up from dirt, but from other kids. Kids who are at daycare tend to have a lot of colds and other illnesses, but have fewer as they grow older. On the other hand, kids who are are not sent o daycare get everything when they start kindergarten. Homeschooled kids will often be more susceptible to all sorts of viruses when they hit colleges, unless they interacted with many other kids in other ways.
Then, of course, the more crowded a location is, the more exposed kids are to novel viruses, and similarly, if the local population or school has many newly families which are newly arrived from other places.
So kids in NYC will get sick much more often than kids in a small town in Idaho, no matter what happens. Even kids who are kin the suburbs will be exposed to far more pathogens, as will kids who grow up in a college town.
Also, we should remember that earth has some REALLY bad pathogens, such as tetanus, bubonic plague, anthrax, melioidosis, and others. So letting kids play in the dirt is good, but one must remember to clean and bandage cuts and scrapes (soap and water, antibiotics if itās deep). Our kid also grew up playing in the dirt, but she had to go on oral antibiotics after a scrape in her knee kept on having infections pop up, and topical antibiotics were not getting rid of it.
That being said, a sterile house is not healthy. It should be reasonably clean and safe, but wiping down everything with Clorox on a regular basis is not healthy (and it messes up furniture as well). Also, playing in the dirt is also good psychologically. A pathological fear of dirt and/or of the outside does not make for a healthy life.
Back to Omicron
It looks as though DC may have peaked, which makes me hopeful that things will peak within the next 10 days or so, or even earlier.