Chills and sore throat are common manifestations of fever caused by upper respiratory tract infections. Upper respiratory tract infection refers to the inflammation of the pharynx, throat and other parts of the body caused by a variety of viruses, bacteria or other pathogens. Upper respiratory tract infections caused by influenza virus are more common, and they are a contagious, seasonal disease. This includes diseases often referred to as colds, acute tonsillitis, acute laryngitis, and viral pharyngitis. Although the symptoms of diseases caused by different causes of upper respiratory tract infections are not all the same, they generally include fever, headache, sore throat, hoarse throat and other symptoms. Among them, fever can make the body feel chilled. It is recommended to drink plenty of hot water and rest, and seek medical attention if symptoms increase.