(Snip) The WHO declared the outbreak a “public health emergency of international concern” after consulting influenza experts during an emergency meeting.

The decision means countries around the world will be asked to step up reporting and surveillance of the disease, and could lead to travel advisories, trade restrictions and border closures. WHO fears the outbreak could spread to other countries and is calling for a coordinated response to contain it. While no Israelis have been diagnosed with swine flu, the Health Ministry will monitor the situation among Israeli tourists to Mexico who develop flu-like symptoms within a week of their return. The virus is a mix of human, pig and bird strains whose initial symptoms are fever and respiratory problems, although these could be the result of other conditions.