[kayodelycaon]

My vote is all of these, with B/C/D being primary.

A: Sterile environments don’t properly prepare the immune system.

B/C/D: People with severe allergies and disabilities aren’t accepted as part of society. Often there is no support for them other than what their family can provide.

The sad fact is many people view medical problems as character flaws. If you were strong, you wouldn’t be sick.

So people die, hide, or never realize their problems for what they are. My grandmother had food allergies her entire life. Never told anyone. She just didn’t eat things that made her sick. Despite being a nurse her entire life, she would say she didn’t have food allergies.