Controversial New Virus Tied to Fatigue Not Transmitted by Blood

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A newly discovered virus that triggered a firestorm of controversy when it was linked to prostate cancer and chronic fatigue syndrome isn’t transmitted through blood, according to researchers.

Tests designed to detect antibodies the immune system would normally produce to latch on to the virus, known as XMRV, failed to find solid evidence of transmission, researchers said. They analyzed 17,249 samples from blood donors.