Healthy pregnancy
Learning Center
COVID-19 vs. flu: Similarities and differences
Find out the similarities and differences between coronavirus disease 2019 (COVID-19) and the flu (influenza) and learn about ways to prevent getting these diseases.
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.
Caffeine and menopause symptoms: Is there a link?
Coffee, tea and other caffeinated drinks may worsen menopausal hot flashes and other vasomotor symptoms.
Cardiac asthma: What causes it?
Wheezing isn't always due to true asthma. Sometimes it's a sign of heart failure. Know the difference.
Chronic cough
A cough that lasts for weeks could be caused by smoking, postnasal drip, asthma, acid reflux, respiratory infections, COPD or another underlying problem.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Coma
Learn what can cause this state of prolonged loss of consciousness. While a coma rarely lasts longer than a few weeks, some people never wake from one.
Craving and chewing ice: A sign of anemia?
Craving and chewing ice (pagophagia) is often associated with iron deficiency with or without anemia.
Cryotherapy for prostate cancer
Find out how very cold temperatures are used to freeze tissue and treat prostate cancer. Learn about the side effects and potential benefits of cryotherapy.
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
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