Urgent prayer request for Landon

After 3 days in the hospital, we returned home with our 9 year old son, Landon. He has a virus and so far they haven't determined the source of it (though some test results aren't due until Wed.). He's still running a 100 degree fever and his white blood cell count is low which means that he's very susceptible to other illness and his appetite is diminished.
Because of this, he's out of school for at least one week of school, maybe more. So he has a ton of schoolwork to do at home each day.
Our prayer request continues to be that they'll be able to pinpoint the cause so they can be sure they are treating the problem correctly. Also, that his cell count will increase and his fever will go away!