Upper respiratory tract infections are contagious and are commonly seen in acute viral pharyngitis, acute herpetic pharyngitis and acute pharyngeal conjunctivitis. Upper respiratory tract infections are relatively common diseases, clinically according to the specific site of infection and the causative agent can be divided into the common cold, acute viral pharyngitis and laryngitis, acute herpetic pharyngitis, acute pharyngoconjunctivitis, acute tonsillitis, etc., basically all have infectious. Upper respiratory tract infections are mainly transmitted through droplet airborne transmission, through talking, sneezing the pathogen into the air, immunocompromised people through the inhalation of air with pathogens are susceptible to infection, or through contact transmission. It is recommended that in daily life, try to avoid going to densely populated places, wear a good mask when going out, keep a certain distance between people, develop good personal hygiene habits, wash your hands regularly, and ventilate the house diligently, which can reduce the incidence of disease to a certain extent.