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Vaccines prevent between 2.5 and 4 million deaths every year.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.