Caspase-1-independent interleukin-1β is required for clearance of Bordetella pertussis infections and whole-cell vaccine-mediated immunity.

PLoS One · 2014 · PMC4157866 · PMID 25198773

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hedged sentence

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may be significantno p-value reported

pertussis caused death but also highlights that there may be significant mutation and strain-specific effects of IL-1 signaling [27] .

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.