[michaelmrose]

Stuff binds to other stuff because the magnetic domains and shape match up well enough.

There is no way to effect something that attacks everything it doesn't recognize because a) there is no ooeration that represents not matching and b) if there was such a cell would be a short lived bomb that would blow up your body.

You adaptive immune system learns to and antigen when a short lived immune cell is semi randomly generated that binds to it and becomes a longer lived cell.

Presumably this could still happen but this normally takes days to happen. In between your inate immune system relies on being able to recognize a lot of existing antigens that are out there and common in attackers.

Having the entire library of malicious life become magically unknown means that you are relying on only your adaptive immune system is available to contain the damage.

[dekhn]

Magnetism does not play a role in binding in biology. The primary determinants of binding are: shape complementarity, electrostatic interactions, van der waals forces, and some amount of hard to explain entropy.

(biomagnetism is a thing, but I'm not aware of any cases where binding occurs due to magnetic forces)

[aeonik]

I think they might have meant they are all geometrically defined EM interactions.

[f1shy]

In biology is much much muuuuch more about physics as chemistry. Is all about the shapes of very big molecules.

[selimthegrim]

There are already examples of immunosilent (to humans) lipids like in Moritella.