noun

immunization

immunisation, vaccination

Childhood immunizations are very important.

Childhood immunisations are very important.

The immunization program was a success.

The immunisation programme was a success.

immunization against ((sth.)) Immunization against measles is common.

Synonyms: vaccination, inoculation, shot

From the verb 'immunize' plus the suffix '-ation', which denotes a process or action. 'Immunize' comes from 'immune'.

The '-ation' ending tells you it's the *process* of making someone immune.

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