Question: How to diagnose 2009 H1N1 Flu ?
Answer: Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated. - The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide. - The English language content on this website is being archived for historic and reference purposes only. General Information Information for Health Care Professionals
Source: CDC