World Health Organization reports 44 deaths in the United States and Mexico . U.S. Navy says 12 crew members aboard the USS Dubuque diagnosed with virus . The U.S. Navy said Friday that 12 crew members aboard the USS Dubuque have been diagnosed with swine flu . Americans agency says it has made critical first step to creating vaccine .
World Health Organization reports 44 deaths in the United States and Mexico . U.S. Navy says 12 crew members aboard the USS Dubuque diagnosed with virus . Americans agency says it has made critical first step to creating vaccine .