Vaccines are developed through a careful process that begins with research to identify the part of a virus or bacteria that triggers an immune response. Scientists then create a vaccine that safely exposes the body to this part, allowing the immune system to learn how to fight the disease without causing illness.

After laboratory tests, vaccines undergo clinical trials to ensure they are safe and effective for humans. Once approved, vaccines are produced and distributed to help prevent infectious diseases, saving millions of lives worldwide. Shutdown123