Deadliest Diseases in human history
Human history is undoubtedly stained with the blood of men, women and children killed in war.
Taking its name from the Ebola River, near which the disease first appeared in 1976, the virus is transmitted from person to person via direct contact with bodily fluids. Symptoms include muscle pain, weakness, and high fever. It has a fatality rate of 90 percent.
An ancient and greatly feared disease, smallpox is fatal in as many as 30 percent of cases. The death toll was estimated at almost 500 million until it was declared eradicated in 1977 after a WHO programme of vaccination.
3. Yellow fever
Transmitted to humans via the bites of infected mosquitoes, these days Yellow Fever occurs most often in South America and Africa, and WHO estimates that of the 200,000 new cases each year, roughly 30,000 die.
Though it typically attacks the lungs, the Tuberculosis bacteria can also affect the brain, spine and kidneys. According to WHO, someone somewhere is infected with TB every second and 1.3 million people died from the disease in 2012.
A highly contagious respiratory disease, many are successfully vaccinated against measles, but it still rages in parts of Africa, Asia and the eastern Mediterranean, causing an astonishing 22 deaths each hour.
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