Washington - The number of human swine influenza cases in the United States increased to 64 Tuesday in five states, the US Centres for Disease Control and Prevention (CDC) said. The worst-affected was New York City, with 45 cases, while California reported 10 cases. There were 6 cases in Texas, 2 in Kansas and 1 in Ohio.
Those who have fallen ill in the US range in age from 7-54 years, with a median age of 16 years. There have been no deaths in the US.