Blue root is not able to prevent influenza. It has the effect of clearing heat and removing toxins (removing heat and toxins from the body), cooling the blood and relieving the throat, and is suitable for dryness of the mouth and throat, sore throat, acute tonsillitis and other conditions caused by heat in the lungs and stomach (the heat of the lungs and stomach is very heavy). Adverse reactions are not clear, and it is contraindicated for those who are weak and have no real fire and heat toxins. Panax quinquefolium can treat the discomfort caused by influenza viruses to a certain extent, but it cannot be used to inhibit and kill influenza viruses, therefore, Panax quinquefolium cannot prevent influenza. During the influenza epidemic season, avoid activities in crowded and confined places, keep windows open for ventilation, and pay attention to personal hygiene. Patients who feel unwell are advised to consult a doctor in time, and should not take medication on their own to avoid delaying their condition.