Immunize (verb)

1. To make someone resistant to a particular infection by providing them with a vaccine or other medical treatment.
2. To protect someone from a disease.

Origin:

From latin immunis, from in- + munis ready, able.

Examples:

1. The entire population will be immunized against the flu this year.
2. The baby was immunized against measles at her 6-month check-up.
3. The school is requiring that all students be immunized against certain diseases before the start of the school year.
4. The scientist's research led to the development of a drug that can immunize people against certain types of cancer.
5. The company has developed a new vaccine that promises to immunize people against the coronavirus.