A huge part of the world's population of the world snores during sleep, something that is usually made fun of by others. But in some cases, snoring is not a laughing matter. It can often be a sign of obstructive sleep apnea, a sleep disorder that can...
This is the VOA Special English Health Report. Chronic obstructive pulmonary disease, or COPD, is a life-threatening condition commonly caused by years of smoking. Doctors say that over time the damage interferes with the natural exchange of oxygen a...