Passive surveillance of adverse events following immunization for National Immunization Program vaccines in Shenyang, China, 2009-2024.

Hum Vaccin Immunother · 2026 · PMC13418704 · PMID 42497098

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an increasing trendno p-value reported

The rate showed an increasing trend with fluctuations from 2009 to 2014 and remained volatile thereafter, with a notable decline in 2021 due to the COVID-19 pandemic.

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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.