Human rhinovirus particles attacking the surface of a cell (purple) of the upper respiratory tract, computer illustration. Rhinovirus particles consist of a protein capsid (multicoloured), enclosing an RNA (ribonucleic acid) genetic code (genome). Rhinoviruses are the cause of the common cold. The viruses infect epithelial cells in the upper respiratory tract, where they replicate and spread. Infection is transmitted through coughs and sneezes.
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