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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.