annie/ankou.........all side effects from H1N1 vaccinations are rare ( we think) although long term side effects cannot be assessed as the vaccine was given in 2009, too short a time to assess. Reactions can occur within 2-3 days, but theses are usually mild, but immediate type hypersensitivity reaction can be life threatening in the allergy predisposed patient.
Long term neurological disorders cannot be evaluated after only one year ( 2009 vaccine) although, I agree are rare.
My point and the point made by AOG is that we do know the long term effects, rare as they are of seasonal influenza vaccine but to add another antigen, of which we do not have the results of long term study, is , in my opinion unreasonable.