Evidence map›Paper›PMID 40186616›Full record

ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2025

Immunity Debt for Seasonal Influenza After the COVID-19 Pandemic and as a Result of Nonpharmaceutical Interventions: An Ecological Analysis and Cohort Study.

Li Chen, Yuchen Guo, Kim López-Güell, Jun Ma, Yanhui Dong, Junqing Xie, Daniel Prieto Alhambra

Abstract read
In one paragraph

Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  12. Post-pandemic resurgence and collapse ofFrontiers in public health · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Li ChenCentre for Statistics in Medicine and NIHR Biomedical Research Centre Oxford, NDORMS, University of Oxford, Oxford, OX3 7HE, UK.ORCID https://orcid.org/0000-0002-8607-8997
Yuchen GuoCentre for Statistics in Medicine and NIHR Biomedical Research Centre Oxford, NDORMS, University of Oxford, Oxford, OX3 7HE, UK.
Kim López-GüellCentre for Statistics in Medicine and NIHR Biomedical Research Centre Oxford, NDORMS, University of Oxford, Oxford, OX3 7HE, UK.
Jun MaInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, 100083, China.
Yanhui DongInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, 100083, China.ORCID https://orcid.org/0000-0003-2519-3200
Junqing XieCentre for Statistics in Medicine and NIHR Biomedical Research Centre Oxford, NDORMS, University of Oxford, Oxford, OX3 7HE, UK.
Daniel Prieto AlhambraCentre for Statistics in Medicine and NIHR Biomedical Research Centre Oxford, NDORMS, University of Oxford, Oxford, OX3 7HE, UK.

Funding

National Key Research and Development Program of China 2022YFC2705300National Key Research and Development Program of China 2024YFC3308300National Natural Science Foundation of China 82103865National Natural Science Foundation of China 82373593
6 · The paper itself

Abstract

Non-pharmaceutical interventions (NPIs) during the COVID-19 pandemic significantly reduced influenza transmission. This study explores the hypothesis of "immunity debt" which suggests increased vulnerability to influenza following reduced exposure during the pandemic. World Health Organization aggregated data on influenza from 116 countries and its association with NPI intensity as measured by the COVID-19 Stringency Index is analyzed. Where individual-level data available (France, the United Kingdom, Spain, Italy, Belgium, and Romania), the analyses of influenza monthly rates in six European countries (France, the United Kingdom, Spain, Italy, Belgium, and Romania) are replicated. The results indicate globally a 46.3% (95% CI: 15.79-70.78%) reduction in influenza cases during COVID-19 restrictions in the winter season, followed by a 131.7% (95% CI: 34.95-255.78%) increase in the first postrelaxation winter and a 161.2% (95% CI: 31.88-382.16%) increase in the summer as compared to the predicted level based on historical influenza epidemic trends. In addition, a positive association between the Stringency Index and post-relaxation influenza surge is observed globally (R

Indexed as

COVID-19Influenza, HumanCohort StudiesEuropeHumansPandemicsSARS-CoV-2SeasonsCOVID‐19immunity debtinfluenzanonpharmaceutical interventions

Identifiers

PMID40186616
PMCPMC12120713

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.