I'm really worried about my dad. He's been coughing since December and I sent his CT scan and FNAC test reports. The FNAC report mentions tuberculosis and sarcoidosis, but no AFB was found. The doctor said it's tuberculosis and prescribed Akurit4, some Benadon, and the Maxiflo inhaler. But his sputum and blood tests didn't show TB. Could it really be tuberculosis? I'm really concerned and was hoping to get some advice.