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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.