Recurring infection mystery

[Nanno]

Hmm... it's possible it is genetic. I almost wonder if something could have happened to that crop of kids that somehow affected their immune systems at a young age or even in utero. A mineral imbalance, exposure to the wrong chemical at the wrong time. I'm kind of grasping at straws here. It is odd that it only affects those three from that generation even though they are not closely related. Have they seen a vet? A vet might take a skin scraping and look for parasites under a microscope or they might know of a vitamin or mineral imbalance that could cause this symptom.