Vaccination is the use of vaccines to protect people from diseases. It is part of healthcare systems in many countries. Vaccines are given to individuals at different ages.

Vaccination programs may take place in hospitals, clinics, or schools. Some vaccines are given as injections, while others are given in different ways. Programs exist for diseases such as measles, polio, and influenza.

Health organizations and governments manage vaccination efforts. These programs are used across populations in many regions.