Fitness basics
Learning Center
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.
COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
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.
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.
Vaginal odor
Learn about causes of unpleasant or unusual odor from the vagina and when to seek care.
Vaginal bleeding after sex
This symptom might not require a checkup. But if you've gone through menopause, contact your health care team to find out the cause of bleeding from the vagina.
Breast rash
Overview covers the definition and possible causes of breast rashes.
Breast calcifications
Most breast calcifications are benign. Find out more about what can cause them, what they look like, and when to see a doctor.
Pelvic pain
This type of pain can be dull or sharp. You may feel it all the time or only sometimes. Learn about possible causes and when to seek care.
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