Troedsson suggested China, as well as other countries, should enhance monitoring of suspected cases of swine flu and step up public awareness of swine flu prevention.

"What is important is transparency and openness, not only to the WHO but also to the public. It's very important that the people understand the situation," Troedsson said.

The WHO also advised the government to support individuals and communities to take precaution measures, he said.

Troedsson said the WHO had been monitoring swine flu round the clock, and had been in close contact with the two countries that first reported swine flu cases -- Mexico and the United States.

It also sent investigation teams to support and assist the Mexican government. The disease has killed about 150 people in the country.

The WHO was prepared to provide support for other members as well when needed, he said. But the organization was not considering recommending travel restrictions to Mexico since the restriction could no longer contain the disease.

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Editor:Yang Jie