Chinese veterinarian officials have said no pigs have been found infected with A/H1N1 virus yet on the mainland. The Agricultural Ministry has called on local authorities to boost monitoring for the disease.
China´s National Development and Reform Commission is asking local governments to strengthen supervision to prevent anyone charging for A/H1N1 vaccinations.
The World Health Organization says there have been no mutated strains of the A/H1N1 flu virus found in the Ukraine. The WHO was responding to recent rumors that a new type of the flu had killed hundreds of people.
U.S. researchers have said that people who have had repeated flu infections, or repeated flu vaccines, may have some protection against the A/H1N1 virus.
The World Health Organization began investigating a suspected A/H1N1 outbreak in Ukraine on Tuesday, causing neighboring Russia and Slovakia to tighten borders with the country.
At least 5,700 people worldwide have been killed by the A/H1N1 influenza, an increase of more than 700 in a week.