I am suffering from cough and cold since 2 weeks this time. Nose block at night, heaviness in chest in the morning. Yellowish mucus. Taken Anti expectorant. But only slight improvement. I am prone to cough and cold. When I feel like old cough is going, I catch new cough infection with runny nose and goes into same process of stages of cough and cold. Though I am fit and stay away from cold beverages, cover well in winter but I think my immunity give up on cough. And I stay in state of cough and cold for 8 months in an year.