Ribbon diagram of African horse sickness virus 1ahs (Orbivirus sp.): a highly infectious disease affecting perissodactyl animals, spread by insect vectors.
By: Laguna Design
Oxford Scientific
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Cholera enterotoxin 1xtc from Vibrio cholera: (Right) The lower pentameric section binds to the surface of the human cell, the red pore delivers the green toxic part of the molecule
By: Laguna Design
Oxford Scientific
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Pandemic virus, Earth superimposed on a virus.
By: Carol & Mike Werner/Visuals Unlimited, Inc.
Visuals Unlimited
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Illustration of "swine flu" virions. H1N1 is an influenza virus that got the name "swine flu" because of genes that it shares with influenza viruses that occur in pigs. Swine flu spreads from human to human like the seasonal flu does. Symptoms include coug
By: Jim Dowdalls
Photo Researchers
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Virus particles, conceptual artwork
By: VICTOR HABBICK VISIONS
Science Photo Library
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Falling pills and a mortar and pedestal
By: Antar Dayal
Illustration Works
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Man with swine flu. H1N1 is an influenza virus that got the name "swine flu" because of genes that it shares with influenza viruses that occur in pigs. Swine flu spreads from human to human like the seasonal flu does. Symptoms include cough, fever, sore th
By: Jim Dowdalls
Photo Researchers
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Flu virus spreading around human silhouette
By: MEHAU KULYK/SPL
Science Photo Library
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Disinfection grounds during the plague, Palermo, Sicily, 1575.
By: NYPL/Science Source
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Woman releasing influenza virus particles from mouth while coughing