Staying healthy
Learning Center
Calcium supplements: A risk factor for heart attack?
Learn about the possible link between calcium supplements and heart attacks.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
Cancer prevention: 7 tips to reduce your risk
Real-life ways to reduce your risk of cancer.
Cataract surgery
Cataract surgery — Overview covers risks, complications, results of this eye surgery.
Cataracts
Are things starting to look fuzzy or blurry? Find out about symptoms, diagnosis and treatment for this common eye condition.
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
Craniopharyngioma
Learn more about this noncancerous tumor that forms near the brain's pituitary gland, including diagnosis and treatment options.
Debunking COVID-19 myths
Some information you come across about COVID-19 may be out of date or false. Learn about COVID-19 myths so you can bust them when you see them.
Dehydration
Dehydration is especially common and dangerous for infants, young children and older adults. Learn more about treating and preventing dehydration.
Delirium
Learn what may cause this change in mental abilities. Symptoms develop fast and include confusion and being unaware of surroundings.
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