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The percentage of CD3+, CD4+CD3+ and CD8+CD3+ T-lymphocytes of different vaccine inoculated groups (n = 4, i.e. number of times the test was repeated). Values are expressed as mean counts ± standard error. Statistically significant differences (P < 0.05) are indicated by * (compared with S-FPV-017 or PBS) or ** (compared with rFPV-S1 alone).
