Science, Tech & Environment

Spain works to predict swine flu spread

Outside of North America, Spain is the country most affected by the swine flu. Scientists there are trying to answer a fundamental question about the H1N1 virus: For each person infected, how many more are likely to become infected? Answering this question will help epidemiologists predict how far and how quickly the virus will spread. The World's Gerry Hadden reports.

Player utilities

Listen to the Story.