immunotherapy

noun

im·​mu·​no·​ther·​a·​py ˌi-myə-nō-ˈther-ə-pē 

i-ˌmyü-nō-

: treatment or prevention of disease (such as an autoimmune disorder, allergy, or cancer) that involves the stimulation, enhancement, suppression, or desensitization of the immune system see adoptive immunotherapy

immunotherapeutic

ˌi-myə-nō-ˌther-ə-ˈpyü-tik 

i-ˌmyü-nō-

adjective

Examples of immunotherapy in a Sentence

Recent Examples on the Web

Interim data from a large trial showed the experimental vaccine, when combined with Merck's blockbuster immunotherapy Keytruda, helped reduce the risk of melanoma recurrence and spread in patients whose tumors have been surgically removed. — Mariam Sunny, USA Today, 25 Aug. 2026

The phase 3 trial involved 1,137 high-risk patients with melanoma, who were randomly assigned to receive either the vaccine and the immunotherapy drug Keytruda, or just Keytruda, for about a year. — Harriet Marsden, TheWeek, 21 Aug. 2026

For those participating in the trial, surgeons had already removed their tumors, and everyone had been treated with Keytruda, the standard immunotherapy. — Kiki Intarasuwan, CBS News, 20 Aug. 2026

When used with Merck's blockbuster immunotherapy Keytruda, the vaccine significantly extended the time patients remained free from melanoma recurrence or its spread to other parts of the body, compared with Keytruda alone. — Lim Hui Jie, CNBC, 20 Aug. 2026

Word History

Etymology

borrowed from German Immunotherapie, from immuno- immuno- + Therapie therapy

Note: The German word was introduced by Paul ehrlich in the lecture "Chemotherapie von Infektionskrankheiten," published in Zeitschrift für ärtzliche Fortbildung, 6. Jahrgang, Nummer 23 (1. Dezember 1909), pp. 721-33.

First Known Use

1910, in the meaning defined above

Phrases Containing immunotherapy

• adoptive immunotherapy

Rhymes for immunotherapy

• pharmacotherapy
• physiotherapy
• radiotherapy
• brachytherapy
• chemotherapy
• cryotherapy
• hydrotherapy
• hypnotherapy
• monotherapy
• phototherapy
• psychotherapy
• sclerotherapy

Medical Definition

immunotherapy

noun

im·​mu·​no·​ther·​a·​py -ˈther-ə-pē 

plural immunotherapies

: treatment or prevention of disease (such as a cancer, autoimmune disorder, or allergy) that involves the stimulation, enhancement, suppression, or desensitization of the immune system

Demonstrating promise is immunotherapy, in which special medications are used to beef up the body's own cancer-fighting cells.

—Harvard Health Letter

If environmental control and pharmacotherapy fail to control symptoms, then allergen immunotherapy—also called hyposensitization or desensitization—may be considered.

—Discover

called also immune therapy

see adoptive immunotherapy

immunotherapeutic

-ˌther-ə-ˈpyüt-ik 

adjective

immunotherapeutic activity

immunotherapeutic methods