Stress can cause goosebumps because it often triggers the same pathways as when we face danger. This is known as the fight or flight response. It is initiated when the brain identifies a danger, either present or impending, and readies the body for action â that is either to fend off the danger (fight response) or maximize the bodyâs resources to flee from the danger (flight response).
1 Symptoms usually appear within one to two days of exposure. 2  Although you typically feel better after a day or two, you're contagious for up to three days after you've recovered. 3  Some people may be contagious for up to two weeks after recovery. 4  Rotavirus.
Influenza, commonly called the flu, is caused by viruses that infect the respiratory tract. Flu symptoms include fever, chills, cough, sore throat, headache, muscle aches, and. fatigue. The incubation period for flu is about one to four days. Flu is contagious, and symptoms may last up to seven to 14 days.