. >> but the battle is far from over from the two nurses who did get sick after karg for duncan in his final days. we begin with abc's tahman bradley. >> reporter: this morning, a huge sigh of relief in dallas. the first group of people quarantined and monitored after contact with ebola patient thomas eric duncan are no longer at risk. 48 people in all, including duncan's relatives and fiance, louise troh. >> after 21 days of being on the watch list, there's zero chance that any of those young men or that louise carries the ebola virus. >> reporter: another person, a dallas lab supervisor, who handled lab samples from duncan, has tested negative, but not before a huge scare. the woman arrived back in texas after a cruise on the carnival "magic." 3600 passengers on board. though the lab supervisor didn't show symptoms, she was quarantined in her cabin for days as fear spread quickly. >> she shouldn't have been on board. she should have stayed home. >> reporter: also this morning, the two nurses who contracted ebola from duncan, nina pham and amber vinson, remained in the hospital. overn