he missed more than 50 days of school. >> mold at hinsdale, she said, was making her son sick. >> thisag represents most of the medications that matthew was on last year. he was given -- right before he went in the hospital for pain. when he left school, he left all this behind, too. he needs none of it. so this is garbage. so this is actually zo ro. >> parents of alexandra pulled her from school after a cough wouldn't go away. that was a tough decision because her father paul was on the school board at the time. >> she was put on a nebraska lizer, steroids and another medication. since she's been at parochial school, she hasn't been on any of it. >> the school district spent $16,000 this fall to get rid of the mold at hinsdale and the board is now trying to decide whether to close the school temporarily to replace a leaky roof and make other repairs. only about 20% to 30% of the population is susceptible to indoor air problems like mold or dust. but for those who are, the symptoms get increasingly severe. in fairfield, connecticut, so many students and teachers were getting sick with