<Ul> <Li> Target likely organisms with first - line drugs: Amoxicillin, Amoxicillin / Clavulanate </Li> <Li> Use shortest effective course: Should see improvement in 2--3 days . Continue treatment for 7 days after symptoms improve or resolve (usually a 10--14 day course). </Li> <Li> Consider imaging studies in recurrent or unclear cases: some sinus involvement is frequent early in the course of uncomplicated viral URI </Li> </Ul> <Li> Target likely organisms with first - line drugs: Amoxicillin, Amoxicillin / Clavulanate </Li> <Li> Use shortest effective course: Should see improvement in 2--3 days . Continue treatment for 7 days after symptoms improve or resolve (usually a 10--14 day course). </Li> <Li> Consider imaging studies in recurrent or unclear cases: some sinus involvement is frequent early in the course of uncomplicated viral URI </Li>

Which of the following is not a typical symptom of a viral upper respiratory tract infection