Vaccine

A vaccine is a medical preparation that helps the body develop protection against specific diseases. It typically contains weakened or inactive parts of a germ (like a virus or bacteria) or a blueprint for making a part of the germ, such as a protein. When introduced into the body, the immune system recognizes these components as foreign and produces a response, including antibodies. This prepares the immune system to recognize and fight the actual germ if it encounters it in the future, helping to prevent illness. Vaccines are crucial in controlling infectious diseases and improving public health.