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In 1959, 69 cases of aseptic meningitis were admitted to various hospitals in Scotland—all apparently due to a Hitherto unrecognized virus. This agent had the characteristics of an ECHO virus but differed from the 28 ECHO viruses at present recognized. Seventy-five strains of the virus were isolated, and human thyroid and human amnion tissue cultures proved much superior to monkey kidney tissue cultures for its isolation.
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I. B. R. Duncan (1961) studied this question.
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