My daughter, who is 10 weeks old also has the delf508 and f508C mutations. I knew about CF before she was born so I looked for signs from day one. I thought she was a normal healthy baby. However, she was not gaining enough weight, and once she was put on enzymes she started gaining weight fast. Her doctor said she is asymptomatic, but I have noticed little things that prove to me that she does have CF. Perhaps some people with these particular mutations show no symptoms of the disease, but then there are some that do. I hope and wish that my daughter will stay asymptomatic, but I know with this disease that anything can happen and Im not going to take the chance of letting this disease take over while I deny that its real.
I really do hope that your son does not show any signs of CF. But I wouldnt be so quick to settle if I were you.
If you wouldnt mind could you show me some of the research you have found that proves the f508c mutation coupled with the delf508 causes the patient to not have CF? I am very curious to learn more about these specific mutaions.