I worked public health for more than 20 years.  I was involved somewhat in our state's response to H1N1.  I am convinced it passed through our small town between the 2nd week in January and the 3rd week of February.  Was very odd sickness, almost everyone had it but mostly just fever, slight headache and fatigue.  Some bit of a cough and some little kids had some stomach problems.  The odd thing was that literally everyone had it and it wasn't very bad, so very few went to the doctor.  My question is: how long after you have had it and recovered do you still test positive?  Should be for at least 10 years if its an antibody test.