A technician illuminates eggs in the candling area of the Sanofi Pasteur influenza vaccine manufacturing facility during a simulation of the vaccine production process in Swiftwater, Pennsylvania, July 19, 2007. Influenza vaccine maker Sanofi Pasteur unveiled a factory on Wednesday that will eventually triple its production of the vaccine as U.S. officials seek to boost output amid fears of a pandemic.
REUTERS/TIM SHAFFER