The autonomic nervous system (ANS) regulates the functions of our internal organs (the viscera) such as the heart, stomach and intestines.
The flu is contagious a day before and five days to a week after its onset. Young children, people over 65, those with compromised immune systems, and people with a terminal illness are at risk of death from the flu.
The person who is suffering from flu can spread the infection one day before the beginning of the symptoms and remains contagious for five to six days after the flu symptoms develop.People who have weak immune system and children are known to remain contagious for more than a week.hey are fever, generalized body ache, throat and nose congestion, cough, headache, chills etc. The length of the illness remains for 5 to 6 days after the onset symptoms, during this period and one day prior to the onset of symptoms the patient remains contagious.