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Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Upward social mobility, though welcome, can place people in a world so different from their world of ... Upward social mobility, though welcome, can place people in a world so different from their world of ...
Antigen (dark green and orange) and antibody (blue and green) binding forming a complex. Antigen (dark green and orange) and antibody (blue and green) binding forming a complex.
Warming friction using the knuckles. The first two knuckles move back and forth on the skin to ... Warming friction using the knuckles. The first two knuckles move back and forth on the skin to ...
Sensory receptors in human skin. Sensory receptors in human skin.
Video: Requirements for nervous signals

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