Staying healthy
Learning Center
Bladder outlet obstruction: Causes in men?
Find out more about the causes of male bladder outlet obstruction and possible next steps.
Blocked tear duct
Watery, irritated eyes may occur when your tears can't drain normally. Learn about this common eye condition that affects newborns and sometimes, adults.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
Blood in semen
Finding blood in your semen can be alarming, but the cause is usually benign. Find out possible causes and when to see a doctor.
Bone health: Tips to keep your bones healthy
Find out what you can do to promote and protect bone health.
Broken collarbone
This common injury is usually the result of falling, playing sports or being in a traffic accident.
Bullous pemphigoid
Learn about the symptoms, treatment and self-care strategies for this blistery skin condition that affects older adults.
COVID-19 antibody testing
Learn how COVID-19 antibody testing is done to find out if you've had a past infection with SARS-CoV-2, the virus that causes coronavirus disease 2019.
COVID-19 diagnostic testing
Find out how to test to learn if you're infected with the virus that causes COVID-19.
COVID-19 drugs: Are there any that work?
Medicine can help people who are at risk of, diagnosed with, or have symptoms of COVID-19.
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