Derek J Duvel

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Much of the DNA was human, but many fragments came from viruses. Before Willner’s expedition, scientists had assumed the lungs of healthy people were sterile. Yet Willner discovered that, on average, people have 174 species of viruses in their lungs. Only 10 percent of the species Willner found bore any close kinship to any virus ever found before. The other 90 percent were as strange as anything lurking in the Cave of Crystals.
A Planet of Viruses
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