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Cluster headache
These painful headaches cause severe pain on one side of the head and tend to occur in bouts called cluster periods.
Coronary artery spasm: Cause for concern?
This sudden, temporary squeezing of an artery reduces blood flow to the heart. Know the causes and treatment.
Cushing syndrome
High levels of the hormone cortisol in your body cause this endocrine disorder. Learn about symptoms, causes and treatment.
Diabetes and depression: Coping with the two conditions
Diabetes and depression can occur together. Here's what you need to know.
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.
Drug allergy
Learn which drugs are more likely to cause an allergic reaction, what symptoms look like and what treatments can calm such a reaction.
E. coli
Most strains of E. coli bacteria are harmless, but some can cause severe symptoms. Learn about symptoms and treatment of this common foodborne illness.
Ebola transmission: Can Ebola spread through the air?
Ebola virus: A Mayo Clinic expert explains how the virus spreads
Fainting during urination (micturition syncope): What causes it?
Fainting during or immediately after urination, called micturition syncope, is a rare occurrence in healthy individuals.
Fallopian tubes: Is pregnancy possible with only one?
Pregnancy may be possible with one fallopian tube.
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