The influenza season began in Texas and although flu activity in the Lone Star state had dropped, it rose again in the beginning of March.
Of 6,372 specimens tested and reported by U.S. World Health Organization and National Respiratory and Enteric Virus Surveillance System collaborating laboratories, 8.4 percent were positive for influenza.
New York City, Delaware, Louisiana, Minnesota, Oklahoma, South Dakota and Virginia reported low influenza-like illness, while 42 states experienced minimal influenza-like illness activity.
Widespread influenza activity -- influenza reported in more than half of the counties in states -- was reported by Connecticut, Delaware, Massachusetts and New York.
Regional influenza activity was reported by Arizona, Illinois, Maine, New Hampshire, New Jersey, Ohio, Oklahoma, Pennsylvania, South Carolina, Texas, Vermont and Virginia.
Local influenza activity was reported by Alaska, Arkansas, California, Florida, Idaho, Iowa, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Montana, Nevada, New Mexico, North Carolina, Rhode Island, South Dakota, Tennessee and Wisconsin.
Sporadic influenza activity was reported by Alabama, Colorado, Georgia, Hawaii, Indiana, Kansas, Mississippi, North Dakota, Oregon, Utah, Washington, West Virginia and Wyoming. Nebraska did not report.