Funnily enough, this entire project sprung out of my trying to replicate the Imperial model a month ago. I found the slow part was the community transmission ke

Funnily enough, this entire project sprung out of my trying to replicate the Imperial model a month ago. I found the slow part was the community transmission kernel, and was surprised to find no epidemiological literature on applying fast multipole methods to the problem. I was even _more_ surprised to find there was no easy-to-use black-box fast multipole method implementation out there. So I wrote one! It felt like a nice balance between 'doing something useful' and 'stepping on epidemiologists' toes'. Incidentally, I believe the Imperial model solves things by dividing the region up into cells of ~half a km across and assuming everyone in the cell is at the center. I didn't know this when I started the project, but kinda assumed it'd do something like that when I couldn't find any work on FMM in epidemiology.