news 4's kimberly suiters reports. >> reporter: thursday morning, alaina made her triumphant return to pallotti high school, announcing to the principal she's cured after being sick -- really sick -- for five days. >> i got swine flu. it was really intense like i just went home and, you know, i had the headache, the fever and the body aches and the chills. it was awful. i went to my doctor the next morning. and she's like, sweetheart, do you feel like you want to die? i said, yeah. she's like, you have it. >> reporter: at minimum, alaina was one of five student was a confirmed swine flu case, but 100 of the school's 500 kids were out this week. alaina noticed the absences a week ago. >> i would go in and like half my dallas would be missing. i was like, where is everybody? >> reporter: the principal who greeted students at the dr the morning after the closure said he didn't want to risk having half the student body and faculty out so he closed the school wednesday for a deep cleaning. >> we just went over all the tight spaces a little more thoroughly than they do at night, spend more t