In 2015, more than half of the 56.4 million deaths in the world (54%) stem from the top 10 reasons, the World Health Organization says. The most deadly disease is ischemic heart disease and stroke, which causes 15 million deaths in 2015.

Lung cancer (together with trachea and bronchi cancers) resulted in 1.7 million deaths, diabetes killed 1.6 million people in 2015. From 2000 to 2015, dementia has doubled deaths.

Lower respiratory tract infections, the most deadly infectious disease, caused 3.2 million deaths worldwide in 2015. Diarrhea is almost half of the deaths from diseases between 2000 and 2015, but still 1.4 million people are said to have died in 2015. Similarly, although tuberculosis kills fewer people in the same period, this disease is among the top 10 causes of 1.4 million deaths.

HIV / AIDS is among the 10 biggest causes of death in the world that killed 1.1 million people in 2015, while it killed 1.5 million people in 2000.