Good news that he is stabilizing.
Just a quick FYI, Asthmatics do not need to be sick to get Pneumonia. The mucus in our airways is supposed to carry normal infectious stuff or even plain irritants in the air around us all the time out of our bodies. In a healthy person the germs & little particles just stick and flow out. But an Asthmatic's body is inefficient at clearing the mucus. Add to that the fact that when someone is having an allergic response or are sick they make more mucus in addition to swelling the airways, which makes them cough, which irritates the airways and on & on. Now you have a body that is perfectly primed for growing the microbes that get stuck while being less capable of defending itself.
Asthma is so delicate. All you need is something to trigger a flare up and then any little thing on top of it can spiral out of control at the speed of light. Poor Kyree, my heart breaks for him and his family.