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.
7. LUNG CANCER
The most common cancer-related killer worldwide, lung cancer is responsible for 1.38 million deaths each year.
According to WHO, smoking is the most important risk factor in 70 percent of deaths.
Cholera causes severe vomiting and diarrhoea and death can occur within hours.
Most prevalent in countries where access to clean water is limited, WHO estimates that there are some 3 to 5 million cases each year.