Pharyngitis is mainly an acute upper respiratory tract infection caused by viral infection. The infectious period of upper respiratory tract infection is generally incubation period in 2-4 days, and the incubation period is the most infectious, and the onset period is generally in 4-6 days. If there is no secondary bacterial infection and no complications, the systemic symptoms disappear in about a week and the disease heals itself. During the onset period there is still contagiousness, which only disappears when the systemic symptoms disappear. It is important to isolate patients with acute pharyngitis, especially in areas where children live in kindergartens and schools. Once a child develops the disease, he or she needs to rest at home to avoid becoming a source of infection and transmitting the disease to other children, and to disinfect public places properly.