U.S. Centers for Disease Control and Prevention officials said there’s no reason for the public to take unusual measures against it.
“CDC is concerned, but that’s our job,” said CDC spokesman Tom Skinner.
Health officials have long feared the emergence of a deadly form of flu. They have not noted a spike in flu cases or a rash of severe illnesses. But they are continuing to investigate the genetics of the virus and track down and test people who may have been in contact with the children.

Families USA and the Pharmaceutical Research and Manufacturers of America (PhRMA) said they would launch a multimillion-dollar advertising and lobbying campaign to get lawmakers to expand Medicaid insurance to more people, provide subsidies for moderate income individuals and families to buy insurance and cap out-of-pocket expenses for low- and middle-income people with insurance.

They say it is possible the children were infected by other people and not by pigs, and said they have consulted with officials in Canada, Mexico and at the World Health Organization although there is no evidence that the new virus is circulating widely.
In a special alert, the CDC asked doctors in California’s San Diego and Imperial counties, on the border with Mexico, to test anyone with flu-like symptoms and send the samples in for testing.