Words / I / Medicine

immunity

noun/ɪˈmjuːnɪti/

B1CEFR level
15/100Rarity: common
TechnicalRegister

The body's ability to resist a particular infection.

Vaccination confers immunity within weeks.

Similar: resistance, protection

Origin: Latin immunis 'exempt'.

Topic: Public health in Medical English

Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.

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More medicine words: Public health