Which diseases are listed as having benefited from animal research?

• A. Polio, cancer, AIDS, diabetes, and multiple sclerosis
• B. Polio and malaria only
• C. Diabetes only
• D. Heart disease and stroke

Answer: (A)

Animal research has driven key advances across many diseases by letting scientists study how diseases develop in living systems and by testing vaccines and therapies before using them in people.

Polio gained its vaccines through work that used animal models to understand how the virus affects nerve cells and to demonstrate safety and efficacy in animals before human trials. In cancer, animal models have been essential for developing and refining chemotherapy, targeted therapies, and immunotherapies, showing how tumors respond to treatments and helping optimize dosing and combinations. For AIDS, studies in non-human primates using related viruses (SIV/SHIV) revealed important details about viral behavior, latency, and treatment approaches, guiding human trials of antiretroviral regimens and vaccine candidates. In diabetes, insulin therapy owes much to experiments with animals—most famously dogs—along with subsequent rodent research that clarified disease mechanisms and dosing. For multiple sclerosis, animal models of autoimmune demyelination, such as experimental autoimmune encephalomyelitis, have been crucial for understanding immune-driven damage and testing anti-inflammatory or immune-modulating therapies.

These examples illustrate how animal research has contributed to breakthroughs across diverse medical areas, including the diseases listed.