“Immunization” or “Immunisation”

Language

Immunization and immunisation are both English terms.

Usage

Immunization is predominantly used in 🇺🇸 American (US) English (en-US) while immunisation is predominantly used in 🇬🇧 British English (used in UK/AU/NZ) (en-GB).

In terms of actual appearance and usage, here's a breakdown by country, with usage level out of 100 (if available) 👇:

Term	US	UK	India	Philippines	Canada	Australia	Liberia	Ireland	New Zealand	Jamaica	Trinidad & Tobago	Guyana
immunization	99	14	81	98	96	8	100	17	11	100	90	100
immunisation	1	86	19	2	4	92	0	83	89	0	10	0

• In the United States, there is a preference for "immunization" over "immunisation" (99 to 1).
• In the United Kingdom, there is a 86 to 14 preference for "immunisation" over "immunization".
• In India, there is a preference for "immunization" over "immunisation" (81 to 19).
• In the Philippines, there is a preference for "immunization" over "immunisation" (98 to 2).
• In Canada, there is a preference for "immunization" over "immunisation" (96 to 4).
• In Australia, there is a 92 to 8 preference for "immunisation" over "immunization".
• In Liberia, there is a preference for "immunization" over "immunisation" (100 to 0).
• In Ireland, there is a 83 to 17 preference for "immunisation" over "immunization".
• In New Zealand, there is a 89 to 11 preference for "immunisation" over "immunization".
• In Jamaica, there is a preference for "immunization" over "immunisation" (100 to 0).
• In Trinidad & Tobago, there is a preference for "immunization" over "immunisation" (90 to 10).
• In Guyana, there is a preference for "immunization" over "immunisation" (100 to 0).

Examples

Below, we provide some examples of when to use immunization or immunisation with sample sentences.

Trends

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