There are many different flu viruses that may cause illness in humans. According to the CDC, the flu spreads from person to person through respiratory droplets, making prevention through hand washing, and other hygiene measures, important. Sometimes it is difficult to tell the flu from other infections as symptoms can be similar.The symptoms of various kinds of flu are similar and common as well.
Fever
A fever is an indication that your body is fighting infection and is one of the primary symptoms of the flu. The body's normal temperature can vary from person to person, but the average is 98.6 degrees. Your body's temperature may be a degree higher or lower than that. When a person contracts the flu virus, he may notice a sudden onset of high fever. According to Familydoctor.org, a fever with a common cold will usually not rise above 102 degrees, but with the flu, fevers can be higher. According to the Mayo Clinic, high fevers above 103 degrees may cause hallucinations, confusion, irritability and convulsions, which can be serious and should be treated by a doctor.
Sore Throat
A sore or scratchy throat is a common symptom of the flu and other upper respiratory infections. It generally is not serious, but can be painful and make it difficult to swallow. Secretions tend to be thick and viscous, irritating the membranes in the throat. If your throat is particularly painful, an over-the-counter pain medication may help. Often, gargling salt water will help relieve some of the swelling and discomfort.
Fatigue
Anytime the body is fighting infection, fatigue is likely to occur. Many people report feeling weak and unable to do anything productive. If you have the flu and don't feel like doing much more than curling up in bed and sleeping, follow your instincts. Most doctors will recommend staying home from work and resting for several days, which will help your body recover and prevent the spread of the virus in the workplace.
Cough
When the body has contracted an influenza virus, it produces an excess of mucus which trickles down the back of the throat, a condition referred to as post nasal drip, according to the Mayo Clinic. Thi drainage in your throat may not even be noticeable but will be irritating to the surfaces of your throat and can lead to a cough. A cough can be annoying, disrupting and may last for weeks after all other symptoms of the flu have abated.
