Worldwide cases of the new H1N1 swine flu virus are spreading so fast that overwhelmed global health officials have stopped counting and officials with the U.S Centers for Disease Control and Prevention say they'll soon follow suit. We don't know the extent of the challenges that we'll face in the weeks and months ahead," said Dr. Anne Schuchat, director of the National Center for the Immunization and Respiratory Diseases. Schuchat did not elaborate on how the CDC would inform the public about the extent of the outbreak, which has been confirmed in more than 40,600 people and implicated in 263 deaths in the United States. WHO had reported nearly 95,000 cases including 429 deaths worldwide. Earlier Friday, WHO officials said tracking individual swine flu cases is too overwhelming for countries where the virus is spreading widely. WHO will no longer issue global totals of swine flu cases, although it will continue to track the global epidemic.