It’s a disease that’s nothing short of frightening. Highly contagious and disfiguring, smallpox once killed about 30 percent of those who fell victim to it. Health officials declared it eradicated worldwide in 1980. But now we worry smallpox may number among the weapons in the arsenals of biological terrorists. Epidemiologist Dick Wenzel (Medical College of Virginia/Virginia Commonwealth University) describes the disease and how we can prevent it.

Also featured: Each year some 10 to 20 percent of Americans come down with the flu. Most of us know that a vaccine is available annually to prevent the virus. Infectious disease specialist Fred Hayden (University of Virginia) outlines efforts to develop a drug that could augment the vaccine and, perhaps, even make it unnecessary.

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