Where it exactly started is still a complete unknown (I think it actually took them ca. 6 years to establish exactly where SARS started). None of those in the market was Patient Zero. The first person in the vicinity known to have caught it hadn't been to the market and lived a couple of bus rides away.Sorry, I can't keep up with the theories. Did it still start in China? Or are we now saying it started in Slough or something?