New discoveries are making scientists rethink what makes us human, and even why we get sick and how to stay healthy. Research estimates that we're only about 43% human. The rest are microorganisms that affect health, mood and how you respond to medication. VOA's Elizabeth Lee visited a lab at the University of California San Diego for a peek at research about the bugs that live in all of us.

Advertisement
Code: 5be83e. 12% OFF Coupon for GitUp Sports Camera & Parts