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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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People about to have surgery must tell their health care providers about all supplements they take.

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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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The longest a person has survived after a heart transplant is 24 years.

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