Pam Horn administers the flu vaccine to employee Michael Karolitzky at Philly Flu Shots on Thursday, Jan. 10, 2013, in Philadelphia. The flu season arrived early in the U.S. this year, but health officials and experts say it's too early to say this will be a bad one. Experts say evidence so far is pointing to a moderate flu season - it just looks worse because last year's season was so mild. Flu usually doesn't blanket the country until late January or February. Now, it's already widespread in more than 40 states. That could change when the next government report comes out Friday. (AP Photo/Matt Rourke)
Not available for use in a retail print or poster.
Not available for any use related to endorsing political candidates or causes.
Pre-approval required from content provider for commercial use in the United States.
Pre-approval from content provider required for use on websites, emails or applications lasting longer than 30 days.
Pre-approval required from content provider for use in photo-streaming and photo-centric mobile or tablet applications.
Not available to AP member newspapers and AP member broadcasters.
Available for license and invoicing to customers located in the United States only.
Uncompressed file sizes and pixel dimensions are approximate. Grayscale images are 1/3 the file size of RGB files. Files downloaded directly from the website are compressed JPEG format. You may request a TIFF file, if available, or a larger interpolated size for your output needs. Please contact Customer Service for associated production fees.