I've had a chronic cough accompanied by phlem and wheezing when my lungs are near empty. This has been going on for 6 weeks. I've seen the doctor 3 times in that time and tried 2 courses of antibiotics. So far nothing has helped. My doc now thinks I have some sort of RSV mutant for adults. He has prescribed prednisone (60mg/day for 3 days) may help knock this out. I know I can't fly on that much prednisone. How long after taking that much can I fly? Is 24 hours enough?