It's a big question--how do viruses change the world? Viruses can have a big impact on the lives of humans, animals, and plants, changing ecosystems and shaping history, but how do they do it? From everyday cold viruses to global pandemics, there is so much to learn about the science behind these illnesses. Discover how scientists track and study these (sometimes invisible) illnesses, and learn about . What viruses are and where they come from How viruses spread between species and across the planet with impressive spread The ways viruses adapt to try to outsmart the immune system The cutting-edge technology that's helping scientists understand and treat these illnesses . and so much more! Beautifully bound with stunning illustrations, this title is part of a unique and collectable series that will start a lifelong interest in science. Each book in the series includes a QR code link to The Big Questions Answered website for comprehensive free teacher resources, kids' activities, and more!.