Question: can upper respiratory tract infection cause red eyes?
Answer: Viral Conjunctivitis Viruses can cause conjunctivitis, such as the familiar red eyes, sore throat, and runny nose of a common cold. Viral conjunctivitis usually produces a watery mucous discharge and lasts from 1 to 2 weeks. Infectious conjunctivitis, commonly known as "pink eye," can be quite contagious.