A look at the eradication of the worst disease known to mankind. But even after its disappearance in 1980, does smallpox still present a threat to the human race?
Explores the astonishing impact and complex science behind the constantly evolving virus. How does the changing nature of influenza, fuel its ongoing threat to the world?
Re-examines the outbreak of one of the world's deadliest viruses on record. How did scientists develop the vaccine that subsided the Ebola infection in 2014?