Volunteers get their shots as Solano County public healthcare professionals conduct a mass flu vaccination drill at the Solano County Fairgrounds in Vallejo, Calif. The drill was to administer up to 1,000 free doses of this season' s flu vaccine in 3 hours to all adult volunteers. The drill tested the readiness of the bay area county to handle an outbreak of a serious communicable disease such as the Avian "Bird" Flu.
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