Monkey at Batu Caves in Malaysia. Jean-François Chénier/Flickr hide caption

A vampire bat's fangs are so sharp that victims hardly notice when the animal slices through their skin and starts drinking blood. Bruce Dale/National Geographic/Getty Images hide caption

A silver-haired bat, the type that transmitted rabies to a woman in Wyoming after apparently biting her while she slept. Lyn Alweis/Denver Post via Getty Images hide caption

Boys show off their four-legged friends at a rabies vaccination drive set up by the Serengeti Health Initiative in the Bariadi District of Tanzania. Anna Czupryna/Courtesy of Serengeti Health Initiative hide caption

Do you know what the deadliest disease is? Hint: It's not Ebola (viral particles seen here in a digitally colorized microscopic image, at top right, along with similar depictions of other contagious diseases) NPR Composite/CDC hide caption

Vampire bats are common in Central and South America, where they feed on livestock and sometimes people. Michael & Patricia Fogden/Corbis hide caption

Is this the flight to Hartsfield? Alexei Zaycev/iStockphoto.com hide caption

Around the world, bites from dogs infected with rabies are the most common way for humans to become infected. CDC hide caption