An experimental H1N1 flu vaccine is drawn into a syringe at the University of Maryland in Baltimore
A syringe extracts an experimental H1N1 swine flu vaccine from a vial before being administered to a medical volunteer during early trials with medical volunteers at the University of Maryland in Baltimore, August 10, 2009. The University of Maryland's School of Medicine is one of the eight university medical centres and clinics trialling the experimental vaccine, expected to become more widely available later in the year, designed to protect against the H1N1 influenza virus. REUTERS/Jason Reed (UNITED STATES HEALTH)
Image available for editorial use, pre-approval required for all other uses.
Content may not be substantially altered without pre-approval from provider.
May not credit Reuters for commercial, political, or advertising usage.
Reuters images are available for licensing to and for use by third parties in the United States, United Kingdom, Canada, Germany, and Belgium only.
Not available for distribution, sale, or license by Corbis' international representatives.
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.