The H1N1 is virtually the exact same thing as the seasonal flu. There have been many, many years of testing and data for mutations, long term effectiveness and side effects, sterilization, etc for the seasonal flu. There is no difference between the H1N1 vaccine and these throughly tested vaccines. They are made the same way, with the same equipment, with the same personnel, with the same proceedures.
That's not what they claim in their documentation. (but yes, I know H1N1 is mild and has the same symptoms as the seasonal flu-- actually the seasonal flu is more deadly by statistical measures)
http://www.fda.gov/downloads/BiologicsBloodVaccines/Vaccines/ApprovedProducts/UCM182406.pdf
http://www.fda.gov/downloads/BiologicsBloodVaccines/Vaccines/ApprovedProducts/UCM182401.pdf
http://www.fda.gov/downloads/BiologicsBloodVaccines/Vaccines/ApprovedProducts/UCM182242.pdf
http://www.fda.gov/downloads/BiologicsBloodVaccines/Vaccines/ApprovedProducts/UCM182404.pdf
Neomycin, Polymyxin, Gentamicin, Arginine, MSG, Formaldehyde, CSL, Mercury... and the list goes on.
Clinical trial side effects... headache, nasal congestion, cough, fever, rhinorrhea, pharyngolaryngeal pain, reactogenicity event, diarrhea, back pain, upper respiratory tract infection, viral infection, lower respiratory tract infection, myalgia, and muscle spasm. (Holy shit, sounds like the flu --> and it actually tests positive for H1N1)
Market released vaccine unsolicited adverse events: dizziness, nausea, vomiting, diarrhea, transient thrombocytopenia, lymphadenopathy, anaphylactic shock, serum sickness, neuralgia, paresthesia, convulsions, encephalopathy, neuritis or neuropathy, transverse myelitis, Guillian-Barre syndrome, vasculitis with transient renal involvement, pruritis, uticaria, rash, influenza-like illness, Stevens-Johnson syndrome, Epistaxis, and brachial neuritis.
Not tested for Carcinogenesis, Mutagenesis, Impairment of Fertility.. section 13.1.