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“The infection might only be in one part of the body and not affect the core temperature enough to cause a fever,” Cohan says. “Other things, like how sensitive each person is to temperature ...
However, in the 1960s, it was shown that animals produced a blood-carried factor X that acted upon the brain to cause sickness behavior. [ 11 ] [ 12 ] In 1987, Benjamin L. Hart brought together a variety of research findings that argued for them being survival adaptations that if prevented would disadvantage an animal's ability to fight infection.
The symptoms can range from mild to severe, and are potentially fatal. [4] [5] [2] Symptoms in mild cases include high blood pressure and a fast heart rate; usually without a fever. [2] Symptoms in moderate cases include high body temperature, agitation, increased reflexes, tremor, sweating, dilated pupils, and diarrhea.
Pyrotherapy (artificial fever) is a method of treatment by raising the body temperature or sustaining an elevated body temperature using a fever. In general, the body temperature was maintained at 41 °C (105 °F). [1] Many diseases were treated by this method in the first half of the 20th century.
The virus that causes Covid-19, SARS-CoV-2, can be spread by asymptomatic individuals who are infected but don’t exhibit any of the common symptoms such as cough, fever, runny nose and sore throat.
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An early stage of hyperthermia can be "heat exhaustion" (or "heat prostration" or "heat stress"), whose symptoms can include heavy sweating, rapid breathing and a fast, weak pulse. If the condition progresses to heat stroke, then hot, dry skin is typical [ 2 ] as blood vessels dilate in an attempt to increase heat loss.
Post-acute infection syndromes (PAISs) or post-infectious syndromes are medical conditions characterized by symptoms attributed to a prior infection. While it is commonly assumed that people either recover or die from infections, long-term symptoms—or sequelae —are a possible outcome as well. [ 1 ]