World Health Organization reports 44 deaths in Mexico and the United States . U.S. Navy says 12 crew members aboard USS Dubuque diagnosed with virus . The CDC has reported more than 100 cases of swine flu across the country since last week.
World Health Organization reports 44 deaths in Mexico and the United States . U.S. Navy says 12 crew members aboard USS Dubuque diagnosed with virus . European agency says it has made critical first step to creating vaccine .