I know fevers are the body’s method of killing foreign bacteria and infections and such by raising the body’s temperature, but how exactly does it raise the body’s temperature?
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White blood cells send signals to the hypothalamus in your brain (your body’s thermostat), and the hypothalamus tells:
* Your blood vessels to start constricting, to reduce heat loss via the surface of your skin
* Your thyroid to start making hormones to increase your metabolism and produce more heat
* Your muscles to start shivering to also produce more heat
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