SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of chikungunya virus particles (pink) budding from a cell. This alphavirus is transmitted by mosquitoes and causes a rare form of viral fever. Symptoms include a high fever, rash and arthritic joint pain. There is no vaccine or treatment for the disease, which although often severe is rarely fatal. Magnification: x106,500 when printed at 10 centimetres wide.
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