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Learning Center
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.
How do COVID-19 antibody tests differ from diagnostic tests?
Antibody testing shows whether you've had the COVID-19 virus in the past. It's not the same as testing to see whether you have the virus now.
COVID-19, cold, allergies and the flu: What are the differences?
Knowing if you have COVID-19, a cold, the flu or seasonal allergies isn't easy. Find out about the differences between these illnesses.
Different types of COVID-19 vaccines: How they work
Find out how different COVID-19 vaccines cause your body to create antibodies that will fight the COVID-19 virus.
Dark circles under eyes
Overview covers causes, remedies for this common symptom.
Fecal incontinence
Learn about this common issue that causes some people to avoid social situations. Treatments are available.
End-stage renal disease
When kidneys no longer function well enough to meet a body's needs, treatment involves kidney dialysis or kidney transplant.
Craniopharyngioma
Learn more about this noncancerous tumor that forms near the brain's pituitary gland, including diagnosis and treatment options.
Menopause
Find out about this biological change and its long-term health implications — and learn how to manage bothersome hot flashes and other menopause symptoms.
3D mammogram
Find out what to expect during a 3D mammogram to look for breast cancer. Learn how this newer test compares to a standard mammogram.
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