When people come in contact with pathogens, their immune system develops antibodies that prevent future infections – this is called immunity. Vaccination is a safe method of immunisation where your immune system is exposed to an inactive pathogen – enough so that you become immune.
Why adult need vaccination ?
In adulthood it is important to ensure on-going protection against vaccine preventable diseases. The link below provides advice on specific diseases that are important to be protected against in adulthood.