Fitness basics
Learning Center
Mononucleosis: Can it recur?
Mono can return in some rare cases. Learn why that happens.
Enterovirus D68 and parechovirus: How can I protect my child?
Enterovirus D68 and parechovirus infections can lead to serious illness among children. Know the symptoms and what you can do.
Eating the placenta: A good idea?
Despite claims of benefits, eating your placenta after giving birth can be harmful to you and your baby.
COVID-19 variants: What's the concern?
The virus that causes COVID-19 has changed over time, which has affected prevention, diagnosis and treatment of COVID-19.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Measles vaccine: Can I get the measles if I've already been vaccinated?
Is it possible to get measles from someone else if you've been vaccinated?
Zinc for colds: The final word?
Everyone's heard of taking zinc for colds. But does it really work?
Does prickly pear cactus have health benefits?
Have you heard about prickly pear cactus? Find out about some surprising health benefits of this versatile plant.
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
Valerian: A safe and effective herbal sleep aid?
Valerian — Can this sleep aid help you sleep better?
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