Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
Large white butterfly egg
Exercise increases the heart rate.
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Operations Research
Research Methods
Gel electrophoresis, an essential laboratory technique in biological science research