The world's most frightening infections aren't carried by plague-infested rats, rabid dogs, or chimps with Ebola. They're transmitted by "superbugs" -- disease-causing bacteria that can't be killed by antibiotics.
This year, superbugs will kill about 700,000 people, including 23,000 Americans. That toll surge in the coming years as ever-evolving bacteria develop resistance to more antibiotics. By 2050, superbugs could kill 10 million people annually.