Hindsight and improved medical science has shown that during my short stay in Kabul, I contracted Borrelia bacteria (strains of which in the US cause "Lyme Disease") from ticks, which fell off mice that scampered over my feet during sleep, attracted probably by the bits of sweets given to me lovingly by Madaar (Mother), which I kept in my suitcase under the bed.

BBC: Have your say: Harry Patch