vaccination, inoculation all part of immunization.

hepatitis b is a disease that's preventable by vaccination

Sheila Davey has written:

'State of the world's vaccines and immunization' -- subject(s): Child, Children, Communicable Disease Control, Communicable diseases in children, Developing countries, Government policy, Health and hygiene, Immunization Programs, Immunization of children, International cooperation, Medical policy, Organization & administration, Planning, Prevention, Vaccination, Vaccination of children, Vaccination of infants, Vaccines

active immunization by vaccination

A mass immunization campaign is when the vaccination needs lots of people to get the jab for it to work otherwise it doesn't work and the people who had the jab won't get any benefits from having it.