A weekly list of popular questions chosen by WebMD's Editorial Staff.
Answered by Organizations
Most people who have narcolepsy have low levels of hypocretin. This is a chemical in the brain that helps promote wakefulness. What causes low...
Mitochondrial myopathies are a group of neuromuscular diseases caused by damage to the mitochondria -- -small, energy-producing structures that serve...
In the United States, the flu season usually occurs from about November until April. Officials have decided each new flu season will start on Oct. 4...View All