LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Norwalk virus. Artwork showing the surface structure of a Norwalk virus particle. It is composed on an RNA (ribonucleic acid) core surrounded by a protein capsid (coloured), which is icosahedral (20-sided) in shape. The virus causes vomiting, diarrhoea and stomach pains and is transmitted by contaminated food and water.
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