prophylaxis
noun/ˌprɒfəˈlæksɪs/
/ˌprəʊfəˈlæksɪs/
[uncountable] (medical)- action that is taken in order to prevent diseaseWord Originmid 19th cent.: modern Latin, from pro- ‘before’ + Greek phulaxis ‘act of guarding’.
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prophylaxis