Given the liability issue, don't expect to see this on the evening news. But do give it some thought-

Things that we know:
1) PD first described in London 1817.
2) Some claim to earlier recognition, especially in ancient India and China.
3) One feature of PD is a hyperactive immune response.

Other things that we know (Wikipedia):
1) "Inoculation was adopted both in England and in France nearly half a century before Jenner's famous smallpox vaccine of 1796."
2) "The tradition of inoculation may have originated in India in 1000 BCE." and "Early forms of inoculation may have been developed in ancient China"
3) "All vaccinations work by presenting a foreign antigen to the immune system in order to evoke an immune response, but there are several ways to do this."

For more on the role of nuroinflammation...