Delta virus is a strain of New Coronavirus that is highly infectious and causes clinical symptoms similar to those of common New Coronavirus. Some patients have mild symptoms at the onset of the disease, which can easily lead to lowered alertness and may cause substantial transmission after infection. Since there is no specific treatment for delta virus, antiviral and symptomatic treatment are often used. 1. antiviral treatment: there are no clear and effective antiviral drugs, but broad-spectrum antiviral drugs such as acyclovir, lamivudine and oseltamivir are commonly used for clinical treatment. 2. symptomatic treatment: delta virus infection is mostly manifested as fever, sore throat and other clinical symptoms, body temperature does not exceed Patients with body temperature not exceeding 38.5℃ can use alcohol wipe or ice towel cold compress and other physical ways to reduce heat treatment, patients with more serious symptoms can follow medical advice to take Lianhua Qingfei capsule, acetaminophen and other antipyretic and analgesic drugs for treatment. Patients with respiratory distress and hypoxia can receive oxygen therapy. Patients who also have primary diseases such as hypertension, diabetes and hyperlipidemia should also be treated with antihypertensive, glucose and lipid-lowering treatments to prevent aggravation of the disease. In addition, although the new crown vaccine cannot completely prevent delta virus infection, there are studies that have proven that the new crown vaccine can effectively reduce the rate of severe illness and death caused by this virus infection, and it is recommended that patients who have not completed the vaccination should also be vaccinated in a timely manner.