Zack's been using a BiPAP oxygen machine since Sunday. It adds extra pressure to his breathing, helping expand his lungs when he inhales. A few times a day he "sprints" --- uses only an oxygen mask (which supplies extra oxygen but not extra pressure) for about an hour. As long as he's using the BiPAP machine, he's not allowed to eat or drink. Steroids were started today in the hope that they will increase his lung strength.
We are expecting to be in the ICU at least through the weekend.