Have you ever wondered what the world's deadliest diseases look like under a microscope? Well here there are. We've arranged the microscopic images of 10 of the world's most feared diseases.
Above you see the Oriental rat flea. This little guy is famous for transporting one of the most famous deadly pandemics of all time, the Bubonic plague, or the Black Death. The bacteria collects in the darkened hind section of the flea, and when it bites rodents, some of the flea's infected fluids get into the open wound, infecting rodents or whatever else the flea bites.
Historians believe that the plague killed around 25 million people in Europe when it arrived in the 14th century and still affects some people around the world to this day.