Children 14 and younger seem to have some natural immunity to Covid. Researchers aren’t sure why, but it may be that their immune system operates differently than that of adults.
It’s also possible that young children have very few and very mild symptoms when they do get it, which would put their elderly relatives at risk because their grandchildren wouldn’t look sick at all. That fits with your warning to your mother regarding touching her great grandkids.
My 97 yr old mother got Covid from a caretaker, but her symptoms were mild and she recovered in about two weeks. You can’t count on that. Sure worried the rest of us. You just don’t know how this virus will affect you. There’s been no past exposure to it unlike with influenzas. We have no antibody “memory” for it, unless we catch it or unless we get vaccinated.
We have no antibody “memory” for it, unless we catch it or unless we get vaccinated.
If you were infected by a similar coronavirus, you might have some immunity.