An upper respiratory infection, or URI, is an infection of the nose, sinuses, or throat. URIs are spread by coughs, sneezes, and direct contact. The common cold is the most frequent kind of URI. The flu and sinus infections are other kinds of URIs.
Almost all URIs are caused by viruses. Antibiotics won't cure them. But you can treat most infections with home care. This may include drinking lots of fluids and taking over-the-counter pain medicine. You will probably feel better in 4 to 10 days.