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)
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