doctors can diagnose influenza ( flu ) using your symptoms alone if many cases of a similar illness have occurred in the community and if the local health department has confirmed a flu outbreak. tests to confirm you have the flu and to determine the type of virus may be important if: the results may affect treatment decisions. during a confirmed flu outbreak however testing may not be needed even if treatment with an antiviral medication is being considered. in addition to flu-like symptoms you have any unusual symptoms that suggest another condition. health authorities have not identified any other cases of flu in your area. testing may involve blood tests (rarely used) or a culture to identify the virus. some cultures take 24 to 48 hours for results so they will not help your doctor decide whether to prescribe an antiviral medication. a rapid flu test is now available that gives results in 30 minutes. although this test is not 100% accurate it can be useful when deciding whether to use an antiviral medication. webmd medical reference from healthwise this information is not intended to replace the advice of a doctor. healthwise disclaims any liability for the decisions you make based on this information. © 1995-2011 healthwise incorporated. healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated.
what exams and tests help doctors to evaluate or test people for influenza?