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The appeared of major events in popular infectious diseases. From top to bottom are digitally colorized transmission electron microscopic (TEM) or 3D particle structure images of various infectious viruses. Image of Adonavirus: https://commons.wikimedia.org/wiki/File:Adenovirus_3D_schematic.png. Image of HCV: https://commons.wikimedia.org/wiki/File:HCV.png. Image of Zika Virus: https://commons.wikimedia.org/wiki/File:Zika-chain-colored.png.
