Herbs Against the Flu The cold and flu season comes with cold days. Influenza or influenza is a viral disease of the respiratory organs to which the body has no resistance. It is stronger in intensity and lasts longer than a cold. We recognize it by symptoms such as fever, dry cough, general weakness, loss of appetite, and treat it with herbs. The flu season lasts from December to April, with the peak months of January and February. Influenza treatment mainly consists of rest