More than 6 million people worldwide have Parkinson disease. Even though it is classically associated with tremors, the disease has many manifestations and is very treatable for most patients.
Michael S. Okun, MD, from the Department of Neurology at the University of Florida, Gainesville, discusses the pathophysiology, clinical presentation, diagnosis, and treatment of Parkinson disease.
otherwise, long before this latest global pandemic. Cancer, the focus of this issue, is ubiquitous, and one would be hard pressed to find a person anywhere on Earth whose life wasn’t in some way touched by the complex and vexing malady. 
Scientists around the world are racing to develop a vaccine for COVID-19. But experts have said it could take a year to 18 months for one to hit the market. The process for testing and approving a vaccine is long and complicated.
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