Practically all medical breakthroughs in the past century have involved research with animals.
Millions owe their lives to animal research.
I personally have three diseases controlled by operations or medicine developed in animals. They are high blood pressure, benign prostatic hypertrophy, and coronary artery bypass surgery. If so, animal research has benefited you greatly. Eighty-five percent of Hodgkin's disease is now curable because of animal research. Genetic diseases can be studied because five generations of mice can be observed in one year.