Influenza and the common cold
We have all heard of influenza and know it can make you feel very ill, but did you know there are only 3 types of the influenza virus (known as A, B and C) but many strains. However, the common cold can be caused by nearly 200 different viruses.
What is influenza?
Influenza commonly known as 'flu' is caused by a virus. The virus enters the body through the eyes, nose or mouth and travels down into the lungs. Once in the airways, the virus multiplies over and over again. As it does so it causes the first symptoms of flu - a runny nose, sore throat and a cough. The reason why you feel so bad with flu is that the body’s defence system tries to overcome the virus and releases substances to fight it. It is this reaction that causes problems elsewhere in the body, such as aching muscles, headache, fever and weakness.
source: http://www.homehealth-uk.com/medical/influenza.htmHmm darn it, its been 3 weeks i'm stuck with this virus. Ok for one day then bad at the next week. Its getting annoying. No wonder I'm feeling fatigue all the time. I never knew influenza was that dangerous. This so suck = ="