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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.

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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

The thyroid gland is subdivided into two lobes, one on each side of the trachea. The thyroid gland is subdivided into two lobes, one on each side of the trachea.
Side view of the cranium and facial bones. Side view of the cranium and facial bones.
skull side skull side
Stand facing the side of the table and apply cross-handed stretches for the subcutaneous fascia. ... Stand facing the side of the table and apply cross-handed stretches for the subcutaneous fascia. ...
The two visual fields of each eye are nasal (medial) and temporal (lateral) The two visual fields of each eye are nasal (medial) and temporal (lateral)
Frontal section through the right side of the skull showing the three principal regions of the ear Frontal section through the right side of the skull showing the three principal regions of the ear
Video: Role of complement proteins

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