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. 2021 Mar 3;19(3):e06419. doi: 10.2903/j.efsa.2021.6419

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© 2021 European Food Safety Authority. EFSA Journal published by John Wiley and Sons Ltd on behalf of European Food Safety Authority.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited and no modifications or adaptations are made.

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Frequency of samples that were tested with ELISA in pooled LAU 1 regions since the last PCR‐positive sample in the LAU regions in Latvia 
Time point 0 = moment of detecting last PCR‐positive sample in particular LAU 1 region.