Flu or influenza is an infection caused by
the influenza virus which is passed from one
person to the next in the air or by direct
contact. Flu infects the throat, nose or lungs.
The signs of influenza include the sudden onset
of fever (> 37.8 °C), cough, runny or stuffy
nose, headaches, muscle aches and often extreme
fatigue. Flu symptoms may also be caused by
infections other than influenza. True influenza
infection only occurs during annual outbreaks
(epidemics) at times when influenza viruses are
spreading in the local community. Outside of the
epidemic period, these symptoms will mainly be
caused by a different type of infection or
illness.
A common cold is often mistaken for flu.
Proper influenza can be very dangerous to people
with asthma or similar lung problems, the
elderly or the young so it's important to know
the difference between influenza and a heavy
cold or "man-flu".
Once you have had the proper flu, you will
never again confuse it with a cold. Perhaps the
most important thing in deciding if you could
have the flu is to find out if the flu is going
around in your community. If you suddenly start
to feel unwell, call your doctor’s surgery and
ask if the flu is currently prevalent in your
area. Other clear indications of flu are:
- Flu starts very suddenly whilst a cold
will come on gradually
- A cough is normally the first symptom of
flu, with no stuffiness. A cold usually
starts with a blocked or a runny nose or a
sore throat
- Influenza makes you feel unwell in your
whole body, whilst a cold will only affect
the nose, throat, sinuses and upper chest
- If you have flu, you will feel dreadful,
and you will have to go to bed. With a cold,
you may feel unwell, but you can still carry
on
- Flu will normally last a week and leave
you feeling tired for a further 10-14 days.
A cold is normally over in 7 days.
Effective treatments such as
Tamiflu and
Relenza are available to reduce the severity
and length of an attack or prevent infection.
They do not cure influenza or kill the influenza
virus, but prevent the virus from multiplying.
They are usually prescribed where there is a
higher risk of developing complications from an
infection, but they are not a substitute for an
influenza vaccination.
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