This summer intrepid travelers everywhere are strapping on backpacks, dousing themselves in mosquito spray, and getting their inoculations — ready to embark on journeys that will take them into contact with some of the most virulent viruses and nastiest bacteria on the planet. Even those of us who aren’t going off the beaten track may end up in close quarters with microbes we’d rather not befriend. Explore some of the most common infectious diseases around the globe and how to identify them in this infographic.