ArticleCell2023
Dispersal patterns and influence of air travel during the global expansion of SARS-CoV-2 variants of concern.
Article in Cell, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.
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.
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.
Who cites it
47 citing papers in PubMed, 66 citations in OpenAlex.
- Early Detection Intervals for Evaluating Event-Based Surveillance System: Reference Dataset Development Study.JMIR public health and surveillance · 2026Article
- Global approaches to infectious disease surveillance and modeling.Nature medicine · 2026Review
- Assessing the Application of a Genomic Network Analysis in Population Ecology: Inferring Patterns of Dispersal and Geographic Structure in the Emerging Pathogen,Ecology and evolution · 2026Article
- Two years of SARS-CoV-2 genomic surveillance capacity development in Guinea.Scientific reports · 2026Article
- Comparative Analysis of Flight Volume Effects on COVID-19 and Influenza Transmission Across Variable Control Intensities, 2019-2024.The Journal of infectious diseases · 2026Article
- Optimizing global genomic surveillance for early detection of emerging SARS-CoV-2 variants.Nature communications · 2026Article
- Rapid evolution reveals long-range spread of SARS-CoV-2.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Monitoring Cross-Border Dissemination of Antimicrobial Resistance (AMR) via Air Travel to Saudi Arabia: Formulation of Monitoring Strategies to Mitigate AMR Concerns.Environmental science & technology · 2026Article
- Genomic epidemiology of SARS-CoV-2 in Peru from 2020 to 2024.Communications medicine · 2026Article
- Multimodal genomic surveillance for respiratory pathogens at four U.S. international airports: A comparison of air, wastewater, clinical, and national surveillance data.PLOS global public health · 2026Article
- Social, mobility and contact networks in shaping health behaviours and infectious disease dynamics: a scoping review.Infectious diseases of poverty · 2025Article
- Epidemiological dynamics of influenza B virus across multiple seasons in Kenya and Uganda inferred from sequence data, 2010-2021.BMC infectious diseases · 2025Article
- Analysis of the prevalence, spread, and mutation patterns of SARS-CoV-2 variants: data from COVID-19 testing expansion strategy study in salvador, Northeast Brazil.Scientific reports · 2025Article
- Integrated Analysis of the 2022 SARS-CoV-2 Omicron Lineage Replacement Dynamics in Connecticut, US.Viruses · 2025Article
- Improving mobility data for infectious disease research.Nature human behaviour · 2025Article
- Evaluation of the Mutational Preferences Throughout the Whole Genome of the Identified Variants of the SARS-CoV-2 Virus Isolates in Bangladesh.International journal of molecular sciences · 2025Article
- South Asian origin and global transmission history ofmSystems · 2025Article
- The evolution and epidemiology of H3N2 canine influenza virus after 20 years in dogs.Epidemiology and infection · 2025Article
- Epidemiological Transitions in Influenza Dynamics in the United States: Insights from Recent Pandemic Challenges.Microorganisms · 2025Article
- Genomic Epidemiology of the Main SARS-CoV-2 Variants Circulating in Italy During the Omicron Era.Journal of medical virology · 2025Article
Corrections and comments
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Authors and funding
21 authors at 12 institutions in 5 countries.
Funding
Abstract
The Alpha, Beta, and Gamma SARS-CoV-2 variants of concern (VOCs) co-circulated globally during 2020 and 2021, fueling waves of infections. They were displaced by Delta during a third wave worldwide in 2021, which, in turn, was displaced by Omicron in late 2021. In this study, we use phylogenetic and phylogeographic methods to reconstruct the dispersal patterns of VOCs worldwide. We find that source-sink dynamics varied substantially by VOC and identify countries that acted as global and regional hubs of dissemination. We demonstrate the declining role of presumed origin countries of VOCs in their global dispersal, estimating that India contributed <15% of Delta exports and South Africa <1%-2% of Omicron dispersal. We estimate that >80 countries had received introductions of Omicron within 100 days of its emergence, associated with accelerated passenger air travel and higher transmissibility. Our study highlights the rapid dispersal of highly transmissible variants, with implications for genomic surveillance along the hierarchical airline network.
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Registered trials
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.