or [II.2.4. is a centre in which some or all boars have been vaccinated against Aujeszky's disease using a gE deleted vaccine; such boars had been seronegative with regard to Aujeszky's disease before vaccination and were subjected not sooner than 3 weeks later to a further serological examination which did not reveal the presence of antibodies induced by the disease virus;]
The example sentences [G] were kindly provided by the Goethe Institute. Sentences marked by [EU] derived from DGT Multilingual Translation Memory. The European Commission retains ownership of the copyright in the original data.
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![[listen]](/pics/s1.png "oder"){kind=small}