"Virus" é uma música da banda de heavy metal inglesa Iron Maiden, lançada como single em setembro de 1996. É o primeiro single desde "Women in Uniform" de 1980 que não aparece em nenhum álbum de estúdio oficial do Iron Maiden; no entanto, foi incluída no primeiro retrospecto da carreira da banda – Best of the Beast, de 1996, com dois discos. É a única música do Iron Maiden creditada a ambos os guitarristas da banda. Nunca foi executada ao vivo pelo Iron Maiden, mas Blaze Bayley a executou várias vezes em sua carreira solo.
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“Contrarily, there is also mounting evidence that viruses could play a protective role against autoimmunity, whereby viral infections trigger regulatory immune responses, which in turn prevent the onset of autoimmune reactions. It is reasonable that the dual impact of viral infections on autoimmunity is coordinated by different host, viral and environmental factors.”
“When my colleagues and I discovered the first human retrovirus that causes a form of leukemia, a fatal neurological disease, the Journal of Virology rejected the paper. They more or less told me, "Bob, everybody knows it's not real — and go away." I said, "Wow." But then it got published in the Proceedings of the U.S. National Academy of Sciences.”
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