Antibody, protein used by the immune system to identify and neutralize foreign objects like bacteria and viruses

Antiviral drug, used specifically for treating viral infections

Antivenom, biological product used in the treatment of venomous bites or stings

Medication, derived from an animal's blood or serous fluid, often involving:

Truth serum, a general term for sedative drug or unspecified drug that is likely to make people tell truth or divulge information

Antidote, substance which can counteract a form of poisoning

Blood plasma, with clotting factors removed

Serum Institute of India, one of the world's biggest vaccine makers.

Serous fluid, any clear bodily fluid

Serum (Latin for "whey") may refer to: