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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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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

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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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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

The bore and stroke of pistons are used to calculate an engine’s displacement. The bore and stroke of pistons are used to calculate an engine’s displacement.
An engine will not run if the air–fuel mixture is either too rich or too lean. An engine will not run if the air–fuel mixture is either too rich or too lean.
A high-performance aftermarket air filter often can increase airflow into the engine for more ... A high-performance aftermarket air filter often can increase airflow into the engine for more ...
A single overhead camshaft engine with a timing belt that also rotates the water pump. A single overhead camshaft engine with a timing belt that also rotates the water pump.
An upward-sloping spark line usually indicates a mechanical engine problem or a lean air–fuel ... An upward-sloping spark line usually indicates a mechanical engine problem or a lean air–fuel ...
Automotive Engine Performance, 5th Edition Automotive Engine Performance, 5th Edition
Video: Electrocardiogram Examination

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