AMI IMAGES / SCIENCE PHOTO LIBRARY AMI IMAGES / SCIENCE PHOTO LIBRARY
West Nile virus. Coloured transmission electron micrograph (TEM) of West Nile virus (WNV) particles (Flavivirus sp.). The virus is an arbovirus (arthropod-borne virus) and is transmitted to humans and other mammals from infected birds through the bite of a mosquito vector. Symptoms can range from a mild fever to spontaneous bleeding of the skin and circulatory failure, which are often fatal. The virus is commonly found in Africa, West Asia, and the Middle East.
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