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The human body produces and destroys 15 million blood cells every second.

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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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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

An Overview of Perceptual, Stimulus–Response (S-R), and Motor Learning An Overview of Perceptual, Stimulus–Response (S-R), and Motor Learning
Helping maintain accurate patient records is a critical part of the medical assistant's work. Helping maintain accurate patient records is a critical part of the medical assistant's work.
For the 2-year-old, encounters with peers provide valuable practice in communication and social ... For the 2-year-old, encounters with peers provide valuable practice in communication and social ...
Electronic digital thermometers are accurate and easy to read. Electronic digital thermometers are accurate and easy to read.
This depiction breaks stereotypes, but is historically accurate. Shown here is an Iroquois fort. Can ... This depiction breaks stereotypes, but is historically accurate. Shown here is an Iroquois fort. Can ...
In-line blending is the most accurate method for blending ethanol with gasoline because computers ... In-line blending is the most accurate method for blending ethanol with gasoline because computers ...
Video: Male Reproductive System - The gonadotropin releasing hormone

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