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1. • Isn’t an illness

     • A fever itself isn’t an illness. Rather, it’s a symptom of a wide range of health conditions. When your body temperature rises a few degrees above normal, it can be a sign that your immune system has been activated, often to fight an infection. It can also be a side effect of some medications and vaccinations.
     my.clevelandclinic.org/health/symptoms/10880-fever

     Fever Symptoms & Causes: What Is Considered a Fever?

2. my.clevelandclinic.org › health › symptomsFever Symptoms & Causes: What Is Considered a Fever?

   my.clevelandclinic.org › health › symptoms

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   Most providers say a fever is either 100.0 F (37.8 C) or 100.4 F (38 C). When you have a fever, it’s your body’s normal response to fighting an infection or illness. Fevers usually aren’t a serious concern. They typically go away when the infection passes. Find a Primary Care Provider.

3. pmc.ncbi.nlm.nih.gov › articles › PMC7122655Fever in Common Infectious Diseases - PMC - PubMed Central (PMC)

   pmc.ncbi.nlm.nih.gov › articles › PMC7122655

   Although the degree of fever cannot differentiate between viral and bacterial diseases, high fever is associated with a greater incidence of serious bacterial diseases such as pneumonia or meningitis.

4. www.medicinenet.com › what_are_the_5_types_ofWhat Are the 5 Types of Fever? 6 Causes & Symptoms - MedicineNet

   www.medicinenet.com › what_are_the_5_types_of

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   A fever is not an illness but a symptom or sign of an illness or infection in your body.

5. www.mayoclinic.org › diseases-conditions › feverFever - Symptoms and causes - Mayo Clinic

   www.mayoclinic.org › diseases-conditions › fever

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   May 7, 2022 · Fevers below 104 F (40 C) associated with common viral infections, such as the flu, may help the immune system fight disease and are generally not harmful. Fever or elevated body temperature might be caused by: A viral infection; A bacterial infection; Heat exhaustion

6. www.msdmanuals.com › feverFever - Fever - MSD Manual Professional Edition

   www.msdmanuals.com › fever

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   The body's innate febrile response to an infection mitigates and resolves the infection, improves survival by stimulating various immunologic mechanisms, and inhibits the growth of some microorganisms. However, extreme temperature elevation (typically > 41° C) may be damaging.

   • Author: Larry M. Bush

7. www.webmd.com › first-aid › fevers-causes-symptomsFever: Causes, Symptoms, and Treatment - WebMD

   www.webmd.com › first-aid › fevers-causes-symptoms

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   Nov 15, 2023 · A fever can be a sign of several health conditions, which may or may not need medical treatment. The most common causes are infections such as colds and stomach bugs (gastroenteritis). Other ...

8. People also ask

   Is fever a bacterial or viral disease?

   • Fever is common in both bacterial and viral gastroenteritis. High fever is commonly present in many bacterial causes (e.g. Shigella, Salmonella, Shiga toxin-producing E. coli). Fever is often absent or low-grade in other diseases (e.g. enteropathogenic E. coli, cholera). Other febrile conditions cause diarrhoea and need to be differentiated.

   Fever in Common Infectious Diseases - PMC - PubMed Central (PMC)

   pmc.ncbi.nlm.nih.gov/articles/PMC7122655/

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   Is a fever a sign of a serious infection?

   • A fever is a temporary rise in body temperature. It's one part of an overall response from the body's immune system. A fever is usually caused by an infection. For most children and adults, a fever may be uncomfortable. But it usually isn't a cause for concern. For infants, however, even a low fever may mean there's a serious infection.

   Fever - Symptoms and causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759 

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   How does fever affect a person's health?

   • Because fever can increase the basal metabolic rate by about 10 to 12% for every 1° C increase over 37° C, fever may physiologically stress adults with preexisting cardiac or pulmonary insufficiency. Fever can also worsen mental status in patients with dementia. Fever in healthy children can cause febrile seizures. Many disorders can cause fever.

   Fever - Fever - MSD Manual Professional Edition

   www.msdmanuals.com/professional/infectious-diseases/biology-of-infectious-disease/fever

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   Is a high fever a bacterial disease?

   • In developed countries viruses are responsible for most upper and lower respiratory tract infections, including pharyngitis and pneumonia. Although the degree of fever cannot differentiate between viral and bacterial diseases, high fever is associated with a greater incidence of serious bacterial diseases such as pneumonia or meningitis.

   Fever in Common Infectious Diseases - PMC - PubMed Central (PMC)

   pmc.ncbi.nlm.nih.gov/articles/PMC7122655/

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9. patient.info › signs-symptoms › feverFever (High Temperature): Causes, Symptoms, and Treatment

   patient.info › signs-symptoms › fever

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   Sep 8, 2024 · High temperature (fever) is caused by the release of certain chemicals by the immune system, usually as a result of infection or inflammation. Most fevers are caused by infections or other illnesses.