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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.