Get the facts on URTIs with this 100%-accurate animated video. Part of Focus Apps' Understanding Disease: Infectious Diseases & Oncology series, the URTIs app demonstrates infections and inflammation of the sinuses, nasal passages, pharynx, and larynx. URTIs include a range of conditions such as the common cold, rhinitis, pharyngitis, laryngitis, tracheitis, and epiglottitis, a life-threatening condition. Explore the causes, symptoms, diagnosis, treatment, and management of URTIs.