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And here you can see the crossover event.
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Uh, bat, bat, and pig, bat.
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And here is a model of the virus and how it attaches to its host.
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The blue is virus, and the gold is human,
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and the red is the viral attachment protein...
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... and the green is its receptor in the human cells.
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These receptors are found in the cells of both
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the respiratory tract and the central nervous system.
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And the virus attaches to the cell
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like a key slipping into a lock.
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Somewhere in the world, the wrong pig met up with the wrong bat.
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You ever seen anything like this before?