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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.