"PREVENT" best describes the term vaccinate.
Explanation
Vaccination is a type of prevention, that provides controlled exposure to a pathogen, by strengthening the immune system so that it can fight the disease immediately in future.
It protects from very dangerous disease. It controls epidemics, limits drug resistance. Every year it prevents 2-3million people over the world. The vaccine has antigens from the pathogen which later provoke the immune system of the body,stimulates the production of antibodies.