MONA LISA / SANOFI / SCIENCE PHOTO LIBRARY MONA LISA / SANOFI / SCIENCE PHOTO LIBRARY
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Dengue virus infection. Animation of dengue virus particles (dark green) being injected into the human body by a feeding mosquito (Aedes sp.). This virus causes the tropical disease dengue fever in humans. Symptoms can range from a mild fever and joint pain to spontaneous bleeding of the skin and circulatory failure, which are often fatal.
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