Diseases, Conditions, Syndromes

Sex hormones could be key to treating long COVID

Among the many mysteries about long COVID, one of the most vexing has been why women seem to experience the condition more often and more severely than men. Now, scientists are starting to think hormones—and the different ...

Sleep disorders

Acting out dreams can signal a serious disorder

Dreams are excursions of our central nervous system, unfolding when the body is at rest, but our brains are in thrall to rapid eye movement (REM) sleep. For people with a rare condition, their whole body acts out the dream, ...

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