i believe some of the korean infected were us soldiers. not sure. but both korea and japan have proven really really stupid in at least some of what they have done in terms of releasing people from the quarantined ship..in japan i think with 3,000 passengers plus crew..500 diagnosed I think..2 recently died...they released to go home right away via public transportation. Are they nuts? I forget what I read about Korea...I think a woman from the cruise was not quarantined and went to chuch and spread it. An infectious disease professor has a youtube post and says the quarantine measures on ship were as good as useless and he was not afraid of ebola, sars, etc..but he was afraid of this..not sure he meant the virus itself or the precautions.