I assume, with this level of confidence, that we understand everything about Parkinson's now. It is a nerve disease so closely associated with influenza that there was speculation in the 60s that when the last child born during the Spanish Flu epidemic died, it would be completely eliminated as a common disease.

Shouldn't we just look for the ring that we learned how to detect herpes in nerves? Because every virus has to be constructed exactly like herpes in order to infect nerve cells, apparently.