Like the others, I am much saddened by this news and will pray for you and yours, BBB. I'm not so sure about Tico's suggestion re: Colorado. Much of that state is at a high elevation above sea-level; hence the air tends to be thin. I've known people who had no diagnosed lung disorders have difficulty breathing when in Denver. Mile high city, indeed.
Keep us posted, please, BBB. We are all in your corner.