There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Examples of behavioural mechanisms by which animals cope with extreme temperatures.
European Rabbit in Shropshire, England, infected with myxomatosis, a disease caused by the Myxoma vi