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One-step quantitative real-time polymerase chain reaction(qRT-PCR) analysis of viral RNA to assess viral load in the groups with hemorrhagic manifestations (HM) and with no hemorrhagic manifestations (NHM). The data were analyzed using the two-tailed Student's t test and were considered significant at P < 0.05. The averages of each group are shown in bars and standard error of the mean is shown in the error bars. The same letter indicates significant differences.
