Global travel speeds the rate at which infectious disease threats can be delivered to our doorstep. We’ve seen antibiotic resistance travel the globe. Take Carbapenem-resistant Enterobacteriaceae or CRE. This really is a nightmare bacteria, resistant to most, and in some cases all, antibiotics. These microbes are especially deadly, and they can pass their resistance to other microbes through “jumping genes” or plasmids. One type of CRE was first seen in one U.S. state. Now it’s spread to 44. It’s also a recognized problem in other countries.