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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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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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On average, the stomach produces 2 L of hydrochloric acid per day.

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

The form and orientation of desert plants reduces heat gain from the environment and facilitates coo The form and orientation of desert plants reduces heat gain from the environment and facilitates coo
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From your experiences in grade school, can you tell if or how your teachers unintentionally helped ... From your experiences in grade school, can you tell if or how your teachers unintentionally helped ...
The rock cycle and the Earth’s physical environment The rock cycle and the Earth’s physical environment
A sample of work by a Grade 4 student with a specific learning disorder A sample of work by a Grade 4 student with a specific learning disorder
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Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

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