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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The longest a person has survived after a heart transplant is 24 years.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.