# Commission Decision of 8 February 1993 laying down the criteria for vaccines to be used against Newcastle disease in the context of routine vaccination programmes (93/152/EEC), Article 1

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

For the use in routine vaccination programmes:
(a) live attenuated Newcastle disease vaccines shall be prepared from a Newcastle disease virus strain for which the master seed has been tested and shown to have an intracerebral pathogenicity index (ICPI) of:
(i) less than 0,4 if not less than 107 EID50 are administrated to each bird in the ICPI test;
or
(ii) less than 0,5 if not less than 108 EID50 are administered to each bird, in the ICPI test;
(b) . . . . .

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Source: https://www.legislation.gov.uk/eudn/1993/152/article/1 (the official version)
Page: https://openlegislation.uk/eu-decision-1993-152/article-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.