Vaccination

Vaccination is the process of administering a vaccine to an individual to stimulate their immune system to develop immunity to a specific infectious disease. A vaccine typically contains a weakened or inactivated form of a pathogen, a piece of the pathogen, or a closely related non-infectious agent. By introducing this material into the body, the immune system learns to recognize and fight the actual pathogen if exposed in the future. Vaccination serves as a preventive measure against various diseases, helping to reduce the incidence and spread of infections within a population. It is a key public health strategy that contributes to herd immunity, protecting those who cannot be vaccinated due to medical conditions. Vaccination has led to the eradication or significant reduction of many infectious diseases, such as smallpox and polio.