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Vitamin D deficiency
What are the risks of too little vitamin D?
Withdrawal method (coitus interruptus)
The withdrawal method — pulling the penis out of the vagina before ejaculation — isn't the most effective birth control. Learn about the pros and cons.
Prostatectomy
Learn about surgical options and advances in prostatectomy, including robotic surgery, as well as the risks involved with each approach.
COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
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.
Unusual COVID-19 symptoms: What are they?
COVID-19 can cause a wide variety of symptoms, some more common than others. Learn about how COVID-19 can make you feel.
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