antiserum
/ˈæntɪˌsɪrəm/
noun
- A blood serum containing antibodies against a specific disease, used to treat or provide immunity to that disease.
- Doctors administered an antiserum to the patient who had been bitten by a venomous snake.
- Scientists developed a new antiserum to fight the emerging viral strain.
- The antiserum for rabies must be given soon after exposure to be effective.