Non-specific immunological effects of selected routine childhood immunisations: systematic review.

BMJ · 2016 · PMC5063033 · PMID 27737830

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showed a trendno p-value reported

Studies that compared BCG vaccinated with unvaccinated groups showed a trend towards increased IFN-γ production in vitro in the vaccinated groups.

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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.