The UK veterinary authority sent Follow Up Report No. 16 dated 15 January to the World Organisation for Animal Health (OIE).

According to the report, in Outbreak 6 (Norfolk, 2 December 2009), no further clinical cases have occurred and all affected pigs recovered fully, though ongoing circulation of pandemic H1N1 2009 virus within the weaner-breeder herd has been detected by PCR and serology as part of follow-up investigations.

All piglets have fully recovered on this weaner-finisher premises in Outbreak 7 (Norfolk, 22 December 2009).

Programmes of active surveillance for influenza A viruses in the national pig population will continue. Full characterisation will be utilised as necessary in order to monitor for genomic changes that may have implications for veterinary public health. Significant epidemiological developments will be reported to the OIE.