Animal research has been a significant part of many lifesaving discoveries from vaccines and asthma inhalers to leukemia treatments. It is key to improvements in veterinary medicine, as well. Although animals’ use is still necessary, new testing avenues in drug development may reduce their use. Using animals in research is extremely beneficial as they are biologically similar to humans leading to a better result. In addition, because animals have a short life cycle, they can be studied their entire lives. This is crucial for a better understanding of how disease processes work.