Anyone else's DC poorly one after another?!

[LifesTooShortYOLO]

Just wondered if anyone else's children have been poorly with one thing and then another straight after and repeat?! 🤦🏻‍♀️
DS is 4 and at pre school. I remember people telling me when he started Pre school to be prepared as he would be bringing every big home, but geeeeez I'm not even kidding you it's RELENTLESS 😩
My poor boy has had an ear infection, got over that and then the same cycle again of fever, feeling unwell virus etc, then another ear infection (or same one that never cleared up who knows 🤷🏻‍♀️ about a week of respite and then tonight woke up with a fever again 😭 I am sooo fed up of him feeling unwell, I feel so sad for him 🙁
Is this normal for kids to literally get one thing after another?

Very normal, and partly why most of us giggled at the gov who told that that kids cannot pass Covid to one another.

Thank you, I mean I know kids spread germs like wildfire but it just seems like we aren't getting a break right now 🙁

Is it because if he's poorly and immune system is down he then goes back to Pre school once feeling better but then picks up something else because hes low?! Or because kids haven't built up much immunity to virus's and bugs yet?
I'm going mad here 🤯😂