The number of people who get the flu varies from year to year. There are as many as 1 billion cases of the flu around the world in any given year. Find out more in Influenza, one of the titles in the International Outbreaks series. International Outbreaks helps readers understand what diseases are, how they spread, and what people can do to fight them. This is an AV2 media enhanced book. A unique book code printed on page 2 unlocks your interactive eBook. This book comes alive with videos, audio, weblinks, slideshows, activities, and much more. Book jacket.
