The most common virus causing acute coryza is?
The common cold is the most common illness in humans Rhinovirus ( most commonly), Influenza, Parainfluenza, Coronavirus, Respiratory syncytial virus etc all lead to the common cold. (Ref: Cummings, 6th edition, Pg no. 725 )
Arena virus
Rhino virus
RSV
Influenza virus
Nose and paranasal sinuses