The WHO reports this morning that a farm worker in Canada has infected a herd of pigs with swine flu, the first documented case of the virus being passed from humans to animals.  The herd of pigs tested positive for the H1N1 virus after the worker returned from Mexico with the disease. The herd has been quarantined (and the worker?).  Up to 200 pigs had been infected at the Alberta Farm, and that both the man and pigs are recovering, adding that the virus did not seem to have spread. 

The case adds to growing international concern about the safety of eating pork products, with Russia, China, Indonesia, Ukraine, Philippines and Serbia introducing partial or total import bans of pork from the US.  The UN and WTO said on Saturday that there is no justification for such anti-pork trade measures as a result of the swine flu epidemic.