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March 18, 2026Influenza and Other Respiratory VirusesOpen Access

Genomic Epidemiology of Hospital‐Associated SARS‐CoV‐2 Clusters in Hong Kong During a Period of Relaxed Visitation (May–August 2022)

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Authors

HGHaogao GuMLMengting LiRWRuixuan Wang

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Overview

Genomic epidemiology investigates nosocomial SARS‐CoV‐2 clusters in Hong Kong, suggesting limited mobility impacts risk.

Key Points

  • This research aims to understand the dynamics of SARS‐CoV‐2 transmission within hospitals in Hong Kong during relaxed visitation periods.
  • Sequenced 162 viral genomes from 29 suspected clusters across 17 hospitals.
  • Conducted Bayesian phylogeographic analysis on the BA.2.2 lineage.
  • Used generalized additive models (GAMs) to assess the relationship between community mobility and hospital infections.
  • Confirmed 18 nosocomial clusters involving 126 genomes across 13 hospitals, constituting 51.9% of reported cases.
  • Identified the dominant lineage as BA.2.2 with single intraward transmission chains.
  • Found no significant association between viral introduction rates and mobility indices after accounting for time trends.

Cite This Study

Gu et al. (2026) studied this question.

synapsesocial.com/papers/69ba42fb4e9516ffd37a3bd9https://doi.org/10.1111/irv.70249
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Also Consider

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  4. 4Geographical dispersion and transmission of multiple SARS-CoV-2 variants in Hong Kong2026
  5. 5Genomic and Phylogenetic Dissection of SARS‐CoV‐2 Transmission Networks in Healthcare Workers2026