Teen health
Learning Center
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.
Rumination syndrome
Learn about this condition that results in regurgitating and reswallowing food. Behavioral therapy and medicine are treatments.
COVID-19 vaccine: Should I reschedule my mammogram?
Swollen lymph nodes caused by the COVID-19 vaccine can look like breast cancer on a mammogram. Find out what to do if you've got a mammogram scheduled.
Ileoanal anastomosis (J-pouch) surgery
This surgery removes the large intestine. It's often done to treat ulcerative colitis and other bowel conditions.
Cosmetic surgery
The goal of this type of surgery is to improve your appearance. It can involve large changes, so it's important to understand what to expect.
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.
Dark circles under eyes
Overview covers causes, remedies for this common symptom.
Runny nose
Learn more about how to treat this common symptom and when to see a health care provider.
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