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.
Is the Flu Contagious? Yes, the flu is contagious. It spreads when virus-infected droplets are coughed or sneezed into the air. People who are infected are contagious from a day before they feel sick until their symptoms are gone (about 1 week for adults, but this can be longer for young kids). The flu usually happens in small outbreaks, but epidemics â when the illness spreads rapidly and affects many people in an area at the same time â tend to happen every few years.