Nutritional supplements
Learning Center
Infectious diseases
Viruses, bacteria, fungi and parasites can all cause infection. Find out more about how to prevent and treat these conditions.
Malaria
Learn about the symptoms, causes, treatment, and prevention of this infectious disease transmitted to humans through mosquito bites.
Rotavirus
Learn more about this common childhood condition that causes fever, vomiting, diarrhea and sometimes abdominal pain.
Takayasu's arteritis
Understand this rare disease that damages the aorta, the large artery that carries blood from your heart to the rest of your body.
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.
Anaphylaxis
Anaphylaxis, a severe allergic reaction, is an emergency. Learn who's at risk, what to watch for and what to do when it occurs.
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Calcium supplements: When should they be taken?
Timing matters when taking these supplements. Learn how to take them.
Childhood asthma
The lungs and airways of children with asthma become inflamed, interfering with daily activities. Some children can have dangerous attacks.
Hirschsprung's disease
This digestive disorder that's present at birth affects the nerves in the colon. It causes severe constipation but can be treated.
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