I've had the flu jab for several years and can't associate any link with increase in my PD symptoms.
One thing that I wonder about however is that in 2009 or 2010 I was of the 6 million in the UK who had the new swine flu vaccine. For 3 or 4 days afterwards I felt a bit queezy with that inner tremor one gets with flu.
There has been some evidence that one of the swine flu jabs has caused or exacerbated Narcolepsy by producing rogue proteins that damage the part of the brain associated with.sleep.
As PD has links to rogue proteins (Lewy bodies) I often wonder if there could be a link to Swine flu jabs? Having said that, there is, as far as I know, no statistical or scientific link.
It's just that a year and a bit after my Swine Flu vaccine I was diagnosed with PD. Coincidence, I'm almost sure?