The strain of bird flu that can be deadly to humans appears not to have moved through the world with migrating flocks of wild birds, despite scientists' fears.
Thousands of wild birds were tested in a wide variety of countries. There was no sign of the virus at all in Africa, and only sparse detections in Europe. It is unknown why bird flu is not spreading in the wild more widely and quickly.
More than 13,000 wild birds were tested since February in the Netherlands, a major bird migration route. None have carried the virus. The EU has started to ease restrictions in recent weeks, but continues to strictly regulate poultry in farms near wildlife water reserves and river deltas.