A family member has something similar. Difficulty breathing and its not going away. Some flu like symptoms but no fever. Apparently his doctor said that she has seen a couple cases of it. I think he might be back to work soon after almost 2 months of it.
If he is having trouble breathing and it is not going away, then he should invest in a pulse oximeter. It is a convenient tool that can monitor different vital signs, but is most commonly used to measure oxygen saturation. That hydrogen peroxide therapy that I discussed in post number 3,426 is an extremely cost-effective way to get extra oxygen into him.