POEM: Immune Intelligence [PoMo Day 20 – Rondeau Triolet]

Antibodies tell other from I.
A thing my brain can't always do.
To unbid guests they're never shy --
antibodies fight other not I.
If It seems odd, they'll freely pry,
to ID that old sneaky Flu.
Antibodies tell other from I -
a thing my brain can't always do.