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.
How contagious is the flu? You may be contagious one day before developing flu symptoms and five to seven days after symptoms present. This period of time can be extended for kids or people with weakened immune systems. Tips to defend yourself against influenza: Get the flu shot before the end of October; Practice good hand hygiene; Exercise!