When people think of the world’s deadliest diseases, they think of incurable, quick-acting illnesses. But in reality, many of these diseases are not even in the top 10 causes of death worldwide. An estimated 56.4 million people died worldwide in 2015, and 68% of those deaths were due to slow-progressing diseases.

Lack of oxygen in the brain is a serious condition that can damage brain cells permanently. Knowing the signs and symptoms of this condition can help us detect it early and seek medical attention promptly.