Why is it difficult establishing causation for allergies?!
Question: Why is it difficult establishing causation for allergies!?
I know the immune system can become hypersensitive in the presence of allergens!. But why is it difficult working out the cause of allergies!? Is there a specific reason!? Who is at risk and what are the challenges preventing effective intervention and control!? I've done quite a bit of reading around these questions so I know some of the basics but I'm not quite sure which angle to take answering it!.!.!.!.any ideas!?Www@Answer-Health@Com
Answers:
No-one knows for sure!. The best guess right now is a theory called the hygiene hypothesis!.Www@Answer-Health@Com