Instructions: 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.
Input: Flu symptoms usually start within one to four days after infection. Unlike a common cold, the effects of an influenza virus infection can come on very suddenly. The first signs of the flu are often a fever or chills, accompanied by headache, sore throat, dry cough, runny nose, muscle aches, and fatigue. Information in five categories is collected from eight different data sources that allow CDC to: 1  Find out when and where influenza activity is occurring. 2  Track influenza-related illness. 3  Determine what influenza viruses are circulating. 4  Detect changes in influenza viruses. The flu vaccine is available by shot. Get your flu vaccine as soon as the vaccine is available in your area. It is especially important to get the vaccine if you, someone you live with, or someone you care for is at high risk of complications from the flu. If you are exposed to someone with the flu, avoid close contact with the person, and wash your hands frequently. 1  Vitamin C: Although Vitamin C is widely used and has many benefits, there is no scientific proof that it will help you avoid an illness such as the flu or a cold. Flu: A flu shot to prevent it is best. It is about 80% effective. Tamiflu pills if you catch it in the first two days. After that chickensoup, Aspirin or tylenol, (acetaminophen) vitamin c, zinc, .Rest and fluids. How does the flu start out - Does the flu start as a head cold no fever or cough? Sounds like a Cold. I typically find that the actual flu - the disease caused by the Influenza Virus - starts as a rapid onset of fever and chills, often with a dry, non-productive cough, and usually accompanied by chills, body aches, and fatigue. More information on flu vaccines and other flu control measures is available on the Flu.gov website. Q. What do the terms treatment of the flu and prevention (prophylaxis) of the flu mean? A. Treatment is used when a person is given Tamiflu because they have the signs and symptoms of the flu or have been diagnosed with the flu. It can help prevent influenza in some people and will reduce the severity of the symptoms in those who do get it. A Word From Verywell. Of course, do your best to avoid getting the flu at all. Be sure to get your flu vaccine, wash your hands often, and avoid people who are sick with the flu. Getting vaccinated every year is the best way to lower your chances of getting the flu. Flu vaccines can’t cause the flu. Keep in mind that getting the flu vaccine also protects the people around you. So when you and your family get vaccinated, you help keep yourselves and your community healthy. How long does the flu last? As harsh as the flu can be, the good news is that most people feel much better within one to two weeks. Most healthy adults become contagious the day before symptoms develop (which makes it trickier to prevent from spreading). They remain infectious for up to five to seven days after symptoms appear. Query: how long does flu start
Output:
Flu symptoms usually start within one to four days after infection.