Rat

Rats are essential models in research, aiding studies in physiology, immunology, pharmacology, nutrition, behavior, and learning, leading to medical advancements in obesity, diabetes, cancer, cardiovascular, neurological, and immune-related diseases.

Rhesus macaque

Rhesus macaque monkeys, owing to their anatomical and physiological likeness to humans, have been instrumental in developing life-saving vaccines and treatments like those for polio, smallpox, rabies, and HIV/AIDS. They've also contributed to behavioral discoveries, showing promise in neural mechanism studies.