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Difference between Flu and Fever


While both flu and fever share some common symptoms, they are two distinct medical conditions. Fever is generally a sign that the body is fighting off an infection, while the flu is a viral respiratory illness. Knowing the difference between these two illnesses can help you get the treatment you need. Here we will discuss the key differences between flu and fever.

What is Flu?

Flu, or influenza, is a contagious respiratory illness caused by viruses. It can cause severe illness and sometimes leads to death. The best way to prevent flu is to get a flu vaccine every year. Flu vaccines protect against the three most common flu viruses that are circulating. Flu viruses are constantly changing, so it’s important to get vaccinated every year to be protected. Flu vaccines are available in many places, including doctor’s offices, pharmacies, health departments, and travel clinics. You can also get a flu vaccine through your employer, school, or college health center.

What is Fever?

Fever is a medical condition characterized by an elevation of body temperature above the normal range. Fever is caused by a variety of factors, including infection, inflammation, and autoimmune disease. Fever can be beneficial, as it helps the body fight off infection. However, if fever is uncontrolled or lasts for more than a few days, it can lead to dehydration and other serious complications. Fever is treated with medication, such as ibuprofen or acetaminophen, and rest. In severe cases, hospitalization may be necessary.

Difference between Flu and Fever

Flu and fever are often used interchangeably, but they are actually two different things.

  • Flu is a respiratory illness caused by a virus, while fever is a symptom that can be caused by a variety of illnesses.
  • Flu typically comes on suddenly and is accompanied by other symptoms such as headache, body aches, and fatigue.
  • Fever, on the other hand, is simply an elevation in body temperature. It is possible to have a fever without being ill, such as when you are coming down with a cold or the flu.

However, a fever is also a common symptom of more serious illnesses such as pneumonia or meningitis. If you are worried about your fever, it is always best to consult with a doctor.


Fever and flu are both illnesses that can make you feel terrible, but there is a big difference between the two. Fever is caused by a virus or infection, while the flu is caused by a virus. Fever also tends to be short-lived, while the flu can last for weeks. If you’re not sure whether you have the flu or just a fever, it’s important to see your doctor and get tested.

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