participation in the study will be preliminarily identified based on information disclosed during triage upon presentation, followed by full eligibility verification (by the PI or RA) based on information provided by the parent. Recruitment will take place as eligible patients are waiting for physician evaluation. All subjects will be evaluated and screened for study eligibility by the research team prior to study entry. This is a convenience sample of children with pharyngitis; the subjects will be enrolled when a member of the research team is present in the ED. Patient data (name, age, sex, relevant clinical history) will be uploaded into a mobile application by the PI or RA. The identifying information, such as names and dates of birth, of study participants will be omitted from the data library once data collection is complete. The application will consist of a patient input screen, followed by a series of clinical data prompts. Next, a video capture screen where the PI or RA will capture a 3-5 second video of the patients’ throat using the built-in iPhone camera as per recommended steps for video acquisition (see Appendix A.Taking Throat Images with a Smartphone). The treating physician will be blinded to the video take by the PI or RA until they have examined the patient independently. When necessary, a tongue depressor will be used to better visualize the throat.