The 3D image was one of the first created ... Out of 200 different strains of cold, the rinovirus - or nose virus - is one of the most common. It is microscopic - it would take 50,000 rhinoviruses ...

Get the lowdown on the all-too-common common cold. It's an illness caused by a virus. More than 200 types lead to your misery, but the most common one is the rhinovirus, which is thought to be ...