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COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
COVID-19: Who's at higher risk of serious symptoms?
Advanced age and some health conditions can raise the risk of serious COVID-19 (coronavirus disease 2019) illness.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about vitamin D and coronavirus disease 2019 (COVID-19).
Cancer surgery: Physically removing cancer
Surgery is a common treatment for many types of cancers. Learn how health care providers use surgery to prevent, diagnose and treat cancer.
Cancer treatment decisions: 5 steps to help you decide
Get involved in your cancer treatment by partnering with your doctor to evaluate options.
Cardiac ablation
Heat or cold energy applied to the heart can correct rapid or erratic heartbeats. Know when you might need this treatment and the risks.
Cardiac rehabilitation
Learn more about this personalized program to improve heart health through exercise, education and support.
Cardioversion
Learn what to expect during this treatment to reset the heart rhythm.
Cataract surgery
Cataract surgery — Overview covers risks, complications, results of this eye surgery.
Cataracts
Are things starting to look fuzzy or blurry? Find out about symptoms, diagnosis and treatment for this common eye condition.
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