Given the task definition and input, reply with output. Given a passage and a query based on the passage, generate an unambiguous, concise and simple answer to the query from information in the passage. Note that the answer may not be present in exact form.

Influenza (Definition) Influenza is a viral respiratory infection that causes cough, fever, chills, sore throat, muscle aches and headache. While most healthy people suffer few complications from the flu, it can be deadly for pregnant women, babies and children, the elderly and those with weak immune systems. Nature sometimes mutates a flu strain to such a degree that a major part of the world population has never had a similar flu and it may reek havoc, as it did near the end of WWI. Since you get the flu every year, you likely have some partial immunity to new strains and don't get it as bad as some ...Read more The state of your immune system is what determines whether or not you will get sick when exposed to a flu virus Half of people exposed to the flu virus will get sick while the other half won't Everyone's immune system responds to the flu virus in a complex way. The rhinovirus' (common cold) incubation period is between 12-72 hours. Most people show symptoms closer to the 72 hour mark, but it depends on your immune system and the virus you contract. Influenza's incubation period is 1-4 days with 2 days being the most common for showing symptoms. There are many viruses that cause cold and flu symptoms that are not the common cold or influenza. If you were exposed to one of those it may take up to 7 days before symptoms appear. How many people get sick or die from the flu every year? Flu seasons vary in severity depending on a number of factors including the characteristics of circulating viruses, the timing of the season, how well the vaccine is protecting against influenza infection, and how many people got vaccinated. how soon after exposure to the flu virus do symptoms appear? I went to work wed. feeling great my boss was very ill with flu symptoms. We share computers and phones. 7 hours into the job I started feeling tired and weak. About Cold and Flu. Don't let cold and flu season get you down! Dr. Oz and other Sharecare experts offer tips to prevent colds and flu, including why you need an annual flu shot, plus how to recover when you do come down with a cold or flu. See All Health Topics A-Z Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. The Mayo Clinic Diet Online Reduce the impact of stress on your health Answer: So if you're around somebody who has the flu, and the next day you feel pretty good, you're not out of the woods yet. You can actually develop symptoms up to four to five days after being exposed to somebody who has the flu. Next: For How Long Am I Contagious After Being Infected By The Flu? Play Where do Flu Shots Come In? If a healthy immune system is capable of keeping you flu-free year after year, is it necessary for you to get a flu shot? The choice is yours, but keep these four important factors in mind: All vaccines are immune suppressive -- that is, they suppress your immune system, which may not return to normal for weeks to months. Query: how long to get flu when exposed
It takes up to four to five days after being exposed to somebody who has the flu.