AH1N1

Symptoms of influenza may include:
*Body aches, especially joints and throat
*Extreme coldness and fever
*Fatigue
*Headache
*Irritated watering eyes
*Reddened eyes, skin (especially face), mouth, throat and nose
*Abdominal pain

People who contract influenza are most infective between the second and third days after infection and infectivity lasts for around ten days. Children are much more infectious than adults and shed virus from just before they develop symptoms until two weeks after infection.The transmission of influenza can be modeled mathematically, which helps predict how the virus will spread in a population.