Question

an all - inclusive term for any drug used to fight an infection, regardless of its origin or type is a(n)

Explanation:

In the field of Medicine and Health (a subfield of Natural Science), the term for a drug used to fight any infection, regardless of origin or type, is "antimicrobial". Antimicrobials include antibiotics, antivirals, antifungals, etc., and the term encompasses all such agents.

Answer:

antimicrobial