2. Marburg, 2005-2015 (12,000 Deaths)
West Africa
German and Serbian lab workers contracted a new strain of hemorrhagic fever from virus bearing African green monkeys that had been sent to their lab to assist with research on polio vaccines. The severity of the virus was understated at first, although it now boasts a mortality rate of up to 90%. Initial symptoms include headache and fever, with internal bleeding and organ failure following as it spreads. To this day there is no cure, and the most recent case featured an American tourist who explored a Ugandan cave full of fruit bats, contracting the disease and bringing it back with him to U.S soil.
3. Hantavirus, 1993-2013 (600 Deaths)
Southwestern United States
The hantavirus is tricky as it leaves many airborne strains, especially through its primary carrier, namely rodents. To make matters worse, different strains have a different effect on different people. HFRS is common as part of this virus, which was first brought to the attention of authorities during the Korean War. In 1993 it hit the United States, which escalated matters substantially. In its worst form, this virus can lead to kidney failure, leading the victim to a state of distress following their lungs filling with fluid. With a mortality rate of up to 15%, the most recent outbreak happened around 2012 in Yosemite.