Immunostimulants are a category of drugs designed to enhance the body’s immune system’s efficacy. This group of drugs includes vaccines, interferon, and aldesleukin (also known as interleukin-2). Interferon alfa is typically used to manage chronic viral infections like hepatitis C. Interferon beta, on the other hand, is employed in the treatment of certain types of multiple sclerosis. Aldesleukin is commonly used in the treatment of kidney cancer.