Answer: antiserum

AnswerCrossword Clue
ANTISERUMImmunity provider
ANTISERUMSnakebite treatment
ANTISERUMIt provides immunity
ANTISERUMTerm in immunology.
ANTISERUMHerpetologist's supply
ANTISERUMPathogen combatant
antiseruma serum containing antibodies, usually for a particular antigen
antiserumA blood serum containing antibodies against specific antigens, injected to treat or protect against specific diseases