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This digitally colorized transmission electron microscopic (TEM) image depicts numerous Chikungunya virus particles, which are composed of a central dense core that is surrounded by a viral envelope. Each virion is approximately 50nm in diameter.

Photo by: U.S. CDC/Cynthia Goldsmith, James A. Comer, and Barbara Johnson |  VIRIN: 140101-A-A1902-0001.JPG