Evidence map›Paper›PMID 39659228›Full record

ArticleEpidemiology and infection2024

Receiving three doses of inactivated or mRNA COVID-19 vaccines was associated with lower odds of long COVID symptoms among people with a history of SARS-CoV-2 infection in Hong Kong, China: a cross-sectional survey study.

Chen Zheng, Fuk-Yuen Yu, Paul Shing-Fong Chan, Fenghua Sun, Xiang-Ke Chen, Wendy Ya-Jun Huang, Stephen Heung-Sang Wong, Yuan Fang, Zixin Wang

Abstract read
In one paragraph

Article in Epidemiology and infection, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–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

2 citing papers in PubMed.

  1. Effectiveness of COVID-19 Vaccination and Prior Infections to Reduce Long COVID Risk During the Pre-Omicron and Omicron Periods.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2026
    Article
  2. Review
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

9 authors.

Chen ZhengDepartment of Health and Physical Education, Faculty of Liberal Arts and Social Sciences, The Education University of Hong Kong, Hong Kong, China.
Fuk-Yuen YuCentre for Health Behaviours Research, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Paul Shing-Fong ChanCentre for Health Behaviours Research, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Fenghua SunDepartment of Health and Physical Education, Faculty of Liberal Arts and Social Sciences, The Education University of Hong Kong, Hong Kong, China.
Xiang-Ke ChenDivision of Life Science, School of Science, The Hong Kong University of Science and Technology, Hong Kong, China.
Wendy Ya-Jun HuangAcademy of Wellness and Human Development, Hong Kong Baptist University, Hong Kong, China.
Stephen Heung-Sang WongDepartment of Sports Science and Physical Education, Faculty of Education, The Chinese University of Hong Kong, Hong Kong, China.
Yuan FangDepartment of Health and Physical Education, Faculty of Liberal Arts and Social Sciences, The Education University of Hong Kong, Hong Kong, China.
Zixin WangCentre for Health Behaviours Research, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.ORCID 0000-0002-1158-2304

Funding

GRFThe Chinese University of Hong Kong 3110155
6 · The paper itself

Abstract

High prevalence of long COVID symptoms has emerged as a significant public health concern. This study investigated the associations between three doses of COVID-19 vaccines and the presence of any and ≥3 types of long COVID symptoms among people with a history of SARS-CoV-2 infection in Hong Kong, China. This is a secondary analysis of a cross-sectional online survey among Hong Kong adult residents conducted between June and August 2022. This analysis was based on a sub-sample of 1,542 participants with confirmed SARS-CoV-2 infection during the fifth wave of COVID-19 outbreak in Hong Kong (December 2021 to April 2022). Among the participants, 40.9% and 16.1% self-reported having any and ≥3 types of long COVID symptoms, respectively. After adjusting for significant variables related to sociodemographic characteristics, health conditions and lifestyles, and SARS-CoV-2 infection, receiving at least three doses of COVID-19 vaccines was associated with lower odds of reporting any long COVID symptoms comparing to receiving two doses (adjusted odds ratio [AOR]: 0.69, 95% CI: 0.54, 0.87,

Indexed as

COVID-19COVID-19 VaccinesSARS-CoV-2Vaccines, InactivatedAdolescentAdultAgedCross-Sectional StudiesFemaleHong KongHumansMaleMiddle AgedmRNA VaccinesYoung AdultCOVID-19 VaccinesmRNA VaccinesVaccines, Inactivatedboosterinactivated vaccinesLong COVIDmRNA vaccinespost-acute sequelae of COVID-19post-COVID-19 conditionvaccination

Identifiers

PMID39659228
PMCPMC11696583

What OpenQuestion holds

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Registered trials

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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.