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Effectivity of buffers for long-term storage of FMDV O JC vaccine antigen. (a) The 146S particle recovery (%) in each buffer during 1-year storage at 4 °C; (b) The 146S particle recovery (%) in each buffer during 1-year storage at −70 °C. The dotted line is set at 90% recovery. *, p < 0.05, **, p < 0.01. Different lowercase letters indicate significant differences at p < 0.05.
