Enter a clue or pattern or both:
The Clue
It provides immunity (9 letter answer)
The Answer
ANTISERUM
Tags
Notes
The answer ANTISERUM is so rare that it appears less than once every 2500 puzzles.
Related Clues
Herpetologist's supply
Immunity provider
Definition
ANTISERUM as a noun:
1. blood serum containing antibodies against specific antigens; provides immunity to a disease