I don't recall that off-hand, but I know the subject is controversial. Even so, how can scientists find cures for smallpox, Ebola and other diseases if they can't run experiments on them?
That isn't the issue. If a lab tech contracts the disease then they keep it quiet, restrict travel within provinces to Wuhan and from Wohan province, but allow folks to travel freely from Wuhan to the rest of the world (or to Wuhan from the rest of the world) they are quite literally spreading the disease, in what appears to be purposeful action.
The intel agencies believe this to a high confidence rating (it means they are pretty darned sure) according to sources. If this is true, and its seeming more likely as we learn more, then China and the WHO are responsible for some serious worldwide exposure.