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Serum survival of oropharyngeal and blood NTHi isolates. The percent survival of 22 blood and 20 oropharyngeal NTHi isolates for 1 h in 10% pooled normal human serum (NHS) is shown (n = 3). A two-tailed unpaired t test with Welch’s correction was used for statistical analysis. *, P < 0.05.
