A review of Dengvaxia®: development to deployment.

Hum Vaccin Immunother · 2019 · PMC6816420 · PMID 31589551

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a positive trendno p-value reported

Efficacy as a function of time from injection demonstrated a positive trend toward the vaccine in years 0–2 and overall (0–5 years), but there was a safety signal in year 3 among some vaccine recipients.

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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.