This guidance on wearing masks may change because of a pandemic in which large numbers of seemingly healthy people are unknowingly ill.
What, exactly, is the coronavirus? How worried do we all need to be? And what practical steps can we take to protect ourselves?
Alzheimer’s affects 5.8 million Americans, and one in three senior citizens dies with the disease or other forms of dementia.
David Key had never heard of sarcoidosis—until the rare disease stole his health.
More accurately called gastroenteritis, contagious stomach illness is most often caused by two viruses, rotavirus or norovirus.
Caused by a form of bacteria, Lyme disease is transmitted to humans through tick bites.