刚才想起来昨天江苏省人民医院大夫被传染上艾滋病的事。

据文献报道，艾滋病女传男的几率是300分之一。那么一个女艾滋病毒携带者同时传给4个男医生的几率是多少？

用概率统计的语言来说就是，有四个暗箱，每个暗箱里有一个黑球，299个白球，每次从四个箱子里各摸一个球，要试多少次才能摸出四个黑球？

无风不起浪，虽然院方发了声明，但好多这种声明都turned out to be此地无银三百两。Personally, although statistically unlikely when looked at INDIVIDUALLY, I believe this is a true story，they just have tried really really hard for a long long time, and don't forget, in many many many hospitals. lol...

OMG, 吭撒了。