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Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

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.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

An experimentally made Oldowan type core. An experimentally made Oldowan type core.
Upper Paleolithic stone tools include blade-based tools as seen here being produced from a blade cor Upper Paleolithic stone tools include blade-based tools as seen here being produced from a blade cor
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
A positive feedback loop. A positive feedback loop.
Negative feedback control of the female reproductive hormones. Negative feedback control of the female reproductive hormones.
Negative Feedback and Temperature Control Negative Feedback and Temperature Control
Video: DNA Sequences - Dideoxy Sequencing

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