@MatthewDavidH @_stah @jAndyGeorge @michael04121218 @ibrake4ants Here's the problem. Very often the answer to how some gets infected, say at a bar, is "unknown". When it happens (to several people) at a birthday party or wedding or holiday meal, they're all known to each other. So the latter is disproportionately recorded.
@MatthewDavidH@u stah@jAndyGeorge@michael04121218@ibrake4ants这是问题所在。很多时候，一些人是如何感染的，比如在酒吧，答案是“未知的”。当这件事发生在生日聚会、婚礼或假日晚餐上时（对几个人来说），他们彼此都知道。因此，后者被不成比例地记录下来。