Flu season appears to be getting worse in Pennsylvania, with the number of confirmed cases nearly doubling in the past week.
The state Health Department has confirmed nearly 2,200 cases of influenza between Sept. 29 and Dec. 28.
More than 1,000 new cases were reported last week, while over 500 new cases were reported in the prior week.
The hardest-hit areas in central Pennsylvania are Dauphin, Lancaster and York counties.
Cases reported to the Health Department are only a fraction of those in the state, since some people with the flu do not have lab tests performed to determine the cause of illness and others do not go to a doctor when they are sick.
Health officials estimate that 600,000 to 1,200,000 Pennsylvanians get the flu each year, and 200 to 2,000 die from complications of influenza.