Fitness basics
Learning Center
Mononucleosis: Can it recur?
Mono can return in some rare cases. Learn why that happens.
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?
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
MRI: Is gadolinium safe for people with kidney problems?
Older gadolinium contrast agents used with MRI posed a risk for people with severe kidney failure. Newer versions are much safer.
Loss of sex drive in men: Natural with aging?
Age-related loss of sex drive is normal, but sometimes an underlying condition is at play.
Latent autoimmune diabetes in adults (LADA): What is it?
Latent autoimmune diabetes in adults (LADA) is a slow-developing form of diabetes.
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
How to treat baby eczema
Learn simple remedies to easing your baby's discomfort from the pain and irritation of this skin rash.
How to treat a piercing site infection
Learn what you can do at home if your ear new piercing becomes infected.
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.
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