The death toll in Mexico from swine flu is rising, but the rate of the deaths appears to be falling.
Mexican health officials say 152 people are believed to have died from the swine flu, but the number of deaths has fallen for each of the past three days.
Deaths have been reported in 10 of Mexico's 31 states.
Almost 2,000 suspected cases has been reported in Mexico. All schools have been ordered to close until 6 May.
The World Health Organisation says 40 cases are confirmed in the United States, six in Canada, two in Scotland and one in Spain.
Tests are also being carried out on individuals or groups in New Zealand, Australia, Brazil, France, Italy and Israel who fell ill after travel to Mexico. New Zealand has three confirmed cases.
No cases have been confirmed in Australia, but there are 40 people are waiting for test results to confirm whether they have swine flu.
In most cases outside Mexico, people have been only mildly ill and have made a full recovery.
Meanwhile, the United Nations' Food and Agriculture Organisation is sending a team to investigate allegations that industrial pig farms in Mexico were the source of the swine flu outbreak.
Chief veterinary officer Joseph Domenech says rumours that people were falling ill last month near some intensive pig farms meant the agency had to act.
