What is the role of nonhuman primates in medical research?

• A. They are important for studying the brain and developing human vaccines.
• B. They are used only for cosmetic testing.
• C. They are never used in medical research.
• D. They are used exclusively as food sources.

Answer: (A)

Nonhuman primates are used in medical research because their biology closely mirrors human physiology, especially in brain structure and immune function. This similarity makes them particularly valuable for studying how the brain works, how neurological diseases emerge, and how potential treatments might affect the central nervous system. Their immune responses are also more predictive of human responses than those of many other animals, which is crucial when evaluating candidate vaccines and understanding safety and efficacy before human trials.

Research with primates is tightly regulated and guided by ethical considerations, with an emphasis on the 3Rs—replacement, reduction, and refinement—to minimize animal use and suffering and to seek alternatives whenever possible.

The other options don’t fit because primates are not used only for cosmetic testing, they are not never used in medical research, and they are not used exclusively as food sources.