—Marie Rosenthal
Most of the United States has been dealing with more than a deep freeze—there has been an uptake in influenza activity, which rose sharply in the week ending Dec. 30 (week 52), according to the CDC.
Forty-six states reported widespread activity, up from 36 states. Influenza-like illness (ILI) increased from 4.9% to 5.8%. Four states (Hawaii, Maine, New Hampshire and New Jersey) reported regional influenza activity and the District of Columbia reported local