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Neutralization kinetic analysis showed that strains of echovirus types 7, 11 and 17, unlike those of echovirus type 30, varied antigenically over time in Melbourne, Australia.

Using neutralization kinetic analysis, isolates of echovirus types 7, 11 and 17 were found to generally vary antigenically over periods of 22, 20 and 10 years respectively in Melbourne, Australia. This is in contrast to a previous finding of antigenic constancy amongst echovirus type 30 isolates in Melbourne over a 23 year period.