WHO: There Could Have Been Human Cases that Preceded Wuhan Market
on 23rd November, Reuters reported that WHO declared in its daily press conference:

Wuhan market is "likely to have been a point of amplification" of virus transmission, but whether that was by human, animal or environmental spread is not yet known, he said, adding that there had been human cases that preceded that event.
"So this case zero that you mentioned may not be in fact case zero. There could have been other cases that existed that weren't detected because they weren't picked up through current surveillance system."
"That's not a criticism. That's just a possible fact that we need to look back, we need to look retrospectively to see what happened."
"We follow the science".