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COVID-19 diagnostic testing
Find out how to test to learn if you're infected with the virus that causes COVID-19.
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.
Bullous pemphigoid
Learn about the symptoms, treatment and self-care strategies for this blistery skin condition that affects older adults.
Bronchitis
Bronchitis is an inflammation of the tubes that carry air to and from the lungs. Coughing and shortness of breath are the major symptoms.
Broken collarbone
This common injury is usually the result of falling, playing sports or being in a traffic accident.
Bone metastasis
Learn about the symptoms and causes of cancer that spreads to the bones. Find out about treatments, including medications, radiation and surgery.
Bone health: Tips to keep your bones healthy
Find out what you can do to promote and protect bone health.
Bone and joint problems associated with diabetes
If you have diabetes, you're at increased risk of various bone and joint disorders.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
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.
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