$25 blood test identifies any virus you've ever had

A newly-developed $25 (£16) test that can identify any virus that has ever affected a person, from one drop of blood. It's inventors say it can test for more than 1,000 virus strains, and once refined would be cheap enough to deploy on a large scale. "VirScan is a little like looking back in time: using this method, we can take a tiny drop of blood and determine what viruses a person has been infected with over the course of many years," said co-author on a paper announcing the news in...

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