Revaccination with Live Attenuated Vaccines Confer Additional Beneficial Nonspecific Effects on Overall Survival: A Review.

EBioMedicine · 2016 · PMC5006692 · PMID 27498365

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a significant trendno p-value reported

In the urban study, there was a significant trend for larger reduction in mortality with increasing number of smallpox vaccination scars ( Aaby et al., 2006 ).

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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.