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Arrived very quickly, even before the range of the delivery estimate. Very pleased.
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Norwalk virus particle

Norwalk virus particle. Computer artwork of thecapsid of the Norwalk viruswithproteins represented by coloured blobs. The capsidis a protein coat that encloses the virus's RNA(ribonucleic acid)genome. This capsid is icosahedral in shape, with 20 triangular faces. The Norwalk virusbelongs to the family Calciviridae, which aresmall viruses, lacking an outer glycoprotein coat.The virus is transmitted viacontaminated water and food, and causes vomitingand diarrhoea.. Stunning Photo Gifts From Science Photo Library