Colds and flues are typically from an infection from a virus or bacteria or sometimes both. Patients usually come in if they have been treated successfully before or are having trouble with getting them frequently and want help strengthening their immune system. If they have a bad case there will usually be a bacterial infection as well as a viral infection. An immune deficiency is usually due to a lung deficiency. There are Chinese patent herb formulas that work well to help with symptoms and treat viruses or bacteria or both. There are also points that can help and FSM has protocols that work (but you wont see the effects until the next day) for a stuffy head or a sore throat. I can also strengthen your immune system. Typically I can shorten the duration of the cold or flu.