eli5: Why does donating blood risk triggering an existing autoimmune disorder?

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This is not a false premise, I am not eligible to donate blood for this reason.

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Anonymous 0 Comments

It’s not that it triggers a disorder in you, the donor. Historically, the were concerns that it could trigger a disorder in the recipient because of antibodies and immune cells in the blood. Also, people with autoimmune disorders take strong meds to suppress the immune system which could also affect the recipient.

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