Re: 9yr old sick with H1N1 symptoms, BUT got vaccine 18 days ago
A person may be exposed to a virus before getting vaccinated and it may introduce itself within that two week period that the flu vaccination begins to take effect. Also, it may be a non-flu virus such as rhinovirus. Always call your doctor to describe the symptoms. Check out the website for Centers for Disease and Prevention to help answer your questions.
http://www.cdc.gov/Flu/about/qa/flushot.htm. I hope that your family gets well soon!