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.
The time between the exposure to the virus and the symptoms to appear is called the incubation period. The normal incubation period for flu is about 3-5 days. After the incubation period, you start displaying symptoms and excreting enough viruses to infect people around you. It will start with a mild headache, but the next day, you will have a few aches with a low fever. It will turn into a high fever on the third day with a runny nose.