# 2003/422/EC: Commission Decision of 26 May 2003 approving an African swine fever diagnostic manual (Text with EEA relevance) (notified under document number C(2003) 1696), Division 4

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

The incubation period in individual animals is about five to 15 days, but under field conditions clinical symptoms may only become evident in a holding several weeks after virus introduction or even more if mild strains of the virus are concerned.

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Source: https://www.legislation.gov.uk/eudn/2003/422/annex/chapter/II/division/A/division/4 (the official version)
Page: https://openlegislation.uk/eu-decision-2003-422/annex/chapter-II/division-A/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.