The idea that the premier middle distance runner of the time would walk into some second rate medical centre and use unknown and unscreened blood at a time when AIDS was a scare, instead of using his own blood, as all other cases of blood doping were known to use, is beyond ridiculous.
It becomes even more laughable when considering why it would take someone as meticulous as Peter Coe to take a whole season to work out that it must have something to do with sticking someone else's blood into his athlete. Totally implausible.
Real doctors on here and all over the Internet have said how it is contracted. I'll take their word for it over someone with a clear agenda.