what are two uses for vaccines?

Two main uses for vaccines are to protect individuals from getting serious infectious diseases and to help prevent the spread of these diseases to others. Vaccines prepare the body's immune system to recognize and fight specific infections, reducing the risk of illness and its complications, such as severe disease or death. Additionally, vaccines contribute to community protection by lowering the chance that infected individuals will spread diseases to people who cannot be vaccinated or who have weaker immune responses, such as newborns, older adults, or immunocompromised individuals.