immunisation

From French immunisation. Equivalent to immunise +‎ -ation or immune +‎ -isation.

immunisation (countable and uncountable, plural immunisations)

1. (British spelling, immunology) Alternative spelling of immunization
   • 1978, G. J. Ebrahim, Practical Mother and Child Health in Developing Countries (Macmillan Tropical Community Health Manuals), revised edition, London: The Macmillan Press, →ISBN; ELBS edition, London: English Language Book Society and Macmillan Education, 1980 (1982 printing), →ISBN, page 56:

     The larger the number of immunised people in the community the less easy is the spread of disease from one person to another. […] For the purpose of creating ‘herd immunity’, as this process is sometimes called, it is necessary to achieve 80 per cent immunisation of the community.

   • 2017 July 9, Ian Sample, “Hepatitis B jab to be added to immunisations of babies born in UK”, in The Guardian‎:

     All babies born in the UK will receive the hepatitis B jab as part of their routine immunisations from the autumn in an effort to drive down viral infections that cause cirrhosis and liver cancer.

2. (rail transport, electrical engineering) The process of immunising signalling and traction power supplies so they don't interfere with each other.
   • 2020 May 20, Andrew Haines talks to Stefanie Foster, “Repurpose rail for the 2020s”, in Rail, page 33:

     "Secondly, we have to find more cost-effective ways of electrifying. And we've had a real breakthrough in the last couple of years in terms of bridge clearances and immunisation, meaning we've been able to take hundreds of millions of pounds off the cost of electrification.

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immunisation f (plural immunisations)

1. immunization

• “immunisation”, in Trésor de la langue française informatisé , 2012.