Totally off topic bu this is a fascinating documentary into the development of a malaria vaccine. It gives an insight into the time and effort required to develop the vaccine,, research , trials, production, and is entertaining as well.
Being BBC not sure if everyone will have access but this is the link:
The Latest in Efforts to Develop a Vaccine against Parkinson’s
The invisible battle
And the beat goes on, and on
Is there a link between attitudes to covid vaccination and the rejection of conventional medicine in the treatment of PD? 
WHAT NOW? FOUR ACES TO BEAT PARKINSON'S...
