What term describes the process of making a person immune to infection?

The term that best describes the process of making a person immune to infection is immunization. Immunization encompasses both the overall process and the outcomes of becoming immune, typically through exposure to a vaccine that stimulates the body's immune response. It is a broad term that includes not only the vaccination itself but also the development of an immunity that results from that vaccination or natural infection.

Vaccination specifically refers to the act of administering a vaccine, while inoculation often implies introducing a substance into the body to provoke an immune response. Desensitization, on the other hand, is a different process aimed at reducing an allergic reaction rather than providing immunity to infections. Hence, immunization is the most inclusive and accurate term for conveying the complete process of developing immunity against infections.