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Isolation rates of RSV after storage at 4 °C. The isolation rate of RSV by storage periods is shown. Solid bar denotes isolation rate of specimens stored at 4 °C before inoculation into HEp-2 cells on the same day of specimen collection. Gray colored and open bars indicate the isolation rate of specimens stored for 1 day or 2 days after collection, respectively, at 4 °C.
