"Immunization campaigns" are efforts made by health organizations or governments to protect people from diseases by providing vaccinations or shots. Full definition
A global immunization campaign in the mid-20th century eradicated the smallpox virus, one of the deadliest diseases in history (scientificamerican.com)
People like Norman Borlaug, the father of the Green Revolution; Jim Grant, whose global immunization campaigns saved millions of children; and Wangari Maathai, whose Green Belt Movement has planted millions of trees in Kenya and trained thousands of women to be leaders in conservation. (foreignpolicy.com)
At least 15 children, all or most under age 2, have died after receiving an injection in a measles immunization campaign in an opposition - held area of northern Syria. (sciencemag.org)