Constantly something wrong

Pa

Is anyone else’s toddler constantly sick?? He has stomach issues and diarrhea VERY often at least once or twice a week or high fevers or cold at least once a week. This will be his 4th week out of school in a row!!! He was able to go Saturday to his STEM class after being out for 3 weeks and later that night he threw up the ENTIRE night. He was perfectly healthy all day yesterday and today he had to stay home again bc he had a 103+ temp this morning and he’s been sleeping the entire day. He missed all last week due to a cold. The week before same thing. The week before diarrhea. Even before he started school, around 19 months this has been an ongoing problem and it’s getting me worried!! He was never around kids before so I would understand if it’s something that started after he got into school but it’s not 😓 anyone else going thru similar issues??