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COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
Article
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
Answer
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.
Article
Blood in semen
Finding blood in your semen can be alarming, but the cause is usually benign. Find out possible causes and when to see a doctor.
Symptom
Bent penis
Learn what can cause a curved erection and when you may need to see a health care provider.
Symptom
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