When a person smokes a cigarette, the body responds immediately to the chemical nicotine in the smoke. Nicotine causes a short-term increase in blood pressure, heart rate, and the flow of blood from the heart. It also causes the arteries to narrow. Carbon monoxide reduces the amount of oxygen the blood can carry.
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There is a window period between being exposed to HIV and getting accurate results as to whether or not you have actually been infected. Many HIV tests can detect an infection two to three weeks after initial exposure. If someone tests negative on many HIV tests after two weeks since the possible exposure, they're likely HIV-negative, but should still get tested after a certain amount of additional time since everyone can react to the infection differently.
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Ask that your meal be prepared without butter, oil, salt, and sugar. Or ask for vegetables steamed with butter on the side.
True because higher the prevalence of the behavior before the program, the more difficult it becomes to increase the prevalence of the behavior.
Prevalence is the proportion of a particular population found to be affected by a medical condition at a specific time. Prevalence, sometimes referred to as prevalence rate, is the proportion of persons in a population who have a particular disease or attribute at a specified point in time or over a specified period of time.
The prevalence is often useful as it reflects the burden of a disease in a certain population. This is not limited to burden in terms of monetary costs, it also reflects burden in terms of life expectancy, morbidity, quality of life, or other indicators.
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