DDT for me, weekly spraying just outside my bedroom over many years, in fact all round out house. Interestingly this is something that affluent people did, an extra protection against malaria, poor people were not exposed in the same way, their water sources were sprayed.

It is the main reason I am not able to know whether this environmental cause is why both my grandmother and I got PD, or whether there is a hereditary factor, or both........ but there are still questions about why these things affect some people and not others, and it must be this, the predisposing factor, that lies at the heart of why we become pwp........