# Commission Implementing Decision (EU) 2018/945 of 22 June 2018 on the communicable diseases and related special health issues to be covered by epidemiological surveillance as well as relevant case definitions (Text with EEA relevance), Division B: Confirmed case

Extent: E+W+S+N.I.

At least one of the following four:
Isolation of chikungunya virus from a clinical specimen;
Detection of chikungunya viral nucleic acid from a clinical specimen;
Detection of chikungunya specific IgM antibodies in a single serum sample AND confirmation by neutralisation;
Seroconversion or four-fold antibody titre increase of chikungunya specific antibodies in paired serum samples.

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Source: https://www.legislation.gov.uk/eudn/2018/945/annex/II/division/3/division/3.5/division/2/division/B (the official version)
Page: https://openlegislation.uk/eu-decision-2018-945/annex-II/division-3/division-3.5/division-2/division-B
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.