Flu Overview with NBC's Robert Bazell
May 1, 2009
The World Health Organization has raised the swine flu pandemic threat level to 4 on a scale of 1 to 6. NBC's Robert Bazell reports.
Topics:
Entertainment Culture, Human Interest, Health, Pandemics, Medicine, Flu pandemic by country, Swine influenza, Influenza, Flu pandemic, Flu pandemic in the United States, Influenza A virus subtype H1N1, Influenza pandemic, Robert Bazell, Biology, NBC