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(A) Incubation period of V2 and V3 groups; Mann–Whitney test was used to calculate differences between the groups. No statistical difference was found. (B) Evolution period; Mann–Whitney test showed no significant difference (P > 0.05) between the groups. (C) Survival analysis between groups during 30-day observation period; Mantel–Cox test demonstrated a statistical significance between V3 vs. V2 (P = 0.003).
