Hi! Have you looked at natural items to help with building his immune system? Colloidal silver is an excellent immune builder, virus killer and bacteria destroyer!!! It won't work against antibotics if they put him on one and there is no toxic limit. It tastes like water and goes under the tongue for 30 seconds...it looks just like water. I will put 3 or 4 dropperfuls under our tongues in the morning when we are trying to not let symptoms get ahold of us and follow throughout the day with a dropperful several times. I used to put it in my son's drink so he would get it when he was too little and didn't like me giving him medicine. Elderberry is really good for building the immune system also...it comes in chewable tablets which I like better than the liquid...there is one variety that is a good tasting liquid but I can't remember the name. I am sorry for your family going through this challenge. I will pray for the doctors and him!!!