Vaccines are critical in preventing diseases, and the contributions of cows in this area are noteworthy. Some vaccines are developed using inactivated virus serums obtained from cows. For example, bovine-derived vaccines are utilized in preventing diseases that affect both cattle and humans, such as anthrax and Brucellosis. The research into zoonotic diseases—those that can be transmitted from animals to humans—also benefits from understanding cattle physiology and immunology, enabling the development of effective vaccines.