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Epidemiological determinants of spread of causal agent of severe acute respiratory syndrome in Hong Kong
Open accessAbstract
Background Health authorities worldwide, especially in the Asia Pacific region, are seeking effective public-health interventions in the continuing epidemic of severe acute respiratory syndrome (SARS). We assessed the epidemiology of SARS in Hong Kong.Methods We included 1425 cases reported up to April 28, 2003. An integrated database was constructed from several sources containing information on epidemiological, demographic, and clinical variables. We estimated the key epidemiological distributions: infection to onset, onset to admission, admission to death, and admission to discharge. We measured associations between the estimated case fatality rate and patients' age and the time from onset to admission.Findings After the initial phase of exponential growth, the rate of confirmed cases fell to less than 20 per day by April 28. Public-health interventions included encouragement to report to hospital rapidly after the onset of clinical symptoms, contact tracing for confirmed and suspected cases, and quarantining, monitoring, and restricting the travel of contacts. The mean incubation period of the disease is estimated to be 6.4 days (95% CI 5.2-7.7). The mean time from onset of clinical symptoms to admission to hospital varied between 3 and 5 days, with longer times earlier in the epidemic. The estimated case fatality rate was 13.2% (9.8-16.8) for patients younger than 60 years and 43.3% (35.2-52.4) for patients aged 60 years or older assuming a parametric gamma distribution. A non-parametric method yielded estimates of 6.8% (4.0-9.6) and 55.0% (45.3-64.7), respectively. Case clusters have played an important part in the course of the epidemic.Interpretation Patients' age was strongly associated with outcome. The time between onset of symptoms and admission to hospital did not alter outcome, but shorter intervals will be important to the wider population by restricting the infectious period before patients are placed in quarantine.
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“However, there were substantial variations among studies, with no clear indication of what factors might drive such heterogeneity (appendix 1 pp 58, 65), except that the delay reduced over time because of improved population awareness.75”
From Severe acute respiratory syndrome (SARS) mathematical models and disease parameters: a systematic review (2025) · cites this paper as [75]
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“This acute and often severe CoV was spread via airborne droplets and through fomites (Donnelly et al., 2003), which have infected nearly 8,000 peoples with 778 deaths (WHO, 2003) before the episode was shutdown.”
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MicroRNome Analysis Unravels the Molecular Basis of SARS Infection in Bronchoalveolar Stem Cells
Mallick, B., Ghosh, Z., & Chakrabarti, J. (2009) · PLoS ONE · doi:10.1371/journal.pone.0007837 · Cited by 122
“Severe Acute Respiratory Syndrome (SARS) is a new fulminant atypical pneumonia which emerged as a regional and global threat in 2002–2003 with a high mortality rate resulting from acute lung failure [1].”
Severe acute respiratory syndrome (SARS)—paradigm of an emerging viral infection
Berger, A., Drosten, C., Doerr, H. W., Stürmer, M., & Preiser, W. (2003) · Journal of Clinical Virology · doi:10.1016/j.jcv.2003.09.011 · Cited by 126
“Multivariable analysis showed that the presence of diabetes, advanced age or other comorbid conditions were independently associated with a poor outcome (Booth et al., 2003; Donnelly et al., 2003; Fowler et al., 2003) .”
BackgroundStatistical evidence for the usefulness of Chinese medicine in the treatment of SARS
Chen, Z., & Nakamura, T. (2004) · Phytotherapy Research · doi:10.1002/ptr.1485 · Cited by 124
“Donnelly et al. (2003) estimated the fatality rate in Hong Kong to be 13.2% for patients younger than 60 and 43.3% for those over 60, assuming a parametric model.”
BackgroundInfluentialChinese Herbal Medicine for Severe Acute Respiratory Syndrome: A Systematic Review and Meta-Analysis
Liu, J., Manheimer, E. W., Shi, Y. P., & Gluud, C. N. (2004) · The Journal of Alternative and Complementary Medicine · doi:10.1089/acm.2004.10.1041 · Cited by 120
“…case fatality rate varies depending on age group: the rate is less than 1% in persons aged 24 years or younger; 6% in persons aged 25 to 44 years; 15% in persons aged 45 to 64 years; and greater than 50% in persons aged 65 years and older (Donnelly et al., 2003; World Health Organization, 2003b).”
BackgroundColey, S., Lavi, E., Sawicki, S. G., Fu, L., Schelle, B., Karl, N., Siddell, S. G., & Thiel, V. (2005) · Journal of Virology · doi:10.1128/jvi.79.5.3097-3106.2005 · Cited by 112
Kanzawa, N., Nishigaki, K., Hayashi, T., Ishii, Y., Furukawa, S., Niiro, A., Yasui, F., Kohara, M., Morita, K., Matsushima, K., et al. (2006) · FEBS Letters · doi:10.1016/j.febslet.2006.11.046 · Cited by 116
“Severe acute respiratory syndrome (SARS) is characterized by dyspnea with rapidly progressing changes on radiography in the later stages of the illness [1,2].”
BackgroundLi, H., Wang, S., Zhong, F., Bao, W., Li, Y., Liu, L., Wang, H., & He, Y. (2020) · Frontiers in Medicine · doi:10.3389/fmed.2020.00190 · Cited by 115
“It is the third epidemic coronavirus that has emerged in the human population in the Twenty-first century, following the severe acute respiratory syndrome coronavirus (SARS) outbreak in 2002, and the Middle East respiratory syndrome coronavirus (MERS) outbreak in 2012 (3, 4).”
BackgroundInfluentialHe, Y., Wang, J., Li, F., & Shi, Y. (2020) · Frontiers in Microbiology · doi:10.3389/fmicb.2020.01302 · Cited by 114
“0% of COVID-19 patients needed mechanical ventilation (Donnelly et al., 2003; Goyal et al., 2020; Guan et al., 2020).”
BackgroundMiddle East Respiratory Syndrome Coronavirus (MERS-CoV): A Perpetual Challenge
Hajjar, S. A., Memish, Z. A., & McIntosh, K. (2013) · Annals of Saudi Medicine · doi:10.5144/0256-4947.2013.427 · Cited by 108
Severe acute respiratory syndrome: identification of the etiological agent
Drosten, C., Preiser, W., Günther, S., SCHMITZ, H. E., & Doerr, H. W. (2003) · Trends in Molecular Medicine · doi:10.1016/s1471-4914(03)00133-3 · Cited by 113
Mouse Hepatitis Coronavirus A59 Nucleocapsid Protein Is a Type I Interferon Antagonist
Ye, Y., Hauns, K., Langland, J., Jacobs, B. L., & Hogue, B. G. (2006) · Journal of Virology · doi:10.1128/jvi.01634-06 · Cited by 109
“Almost 9,000 people were infected, with a mortality rate overall of 10% and a significantly higher mortality rate of 40% in individuals older than 60 years (18).”
BackgroundThe SARS-CoV ferret model in an infection–challenge study
Chu, Y., Ali, G. D., Jia, F., Li, Q., Kelvin, D. J., Couch, R. C., Harrod, K. S., Hutt, J. A., Cameron, C., Weiss, S. R., et al. (2008) · Virology · doi:10.1016/j.virol.2007.12.032 · Cited by 107
“The average mortality rate is 9.6%; however, among the elderly the rate is 38% to 50% (Chan et al., 2003a,b; Chiu et al., 2003; Donnelly et al., 2003; Tsui et al., 2003).”
BackgroundInfluentialRespiratory Infections in the U.S. Military: Recent Experience and Control
Sánchez, J. L., Cooper, M. J., Myers, C. A., Cummings, J. F., Vest, K. G., Russell, K. L., Sanchez, J. L., Hiser, M. J., & Gaydos, C. A. (2015) · Clinical Microbiology Reviews · doi:10.1128/cmr.00039-14 · Cited by 111
Understanding the Spatial Clustering of Severe Acute Respiratory Syndrome (SARS) in Hong Kong
Lai, P., Wong, C. M., Hedley, A. J., Lo, S. V., Leung, P.-Y., Kong, J. H. B., & Leung, G. M. (2004) · Environmental Health Perspectives · doi:10.1289/ehp.7117 · Cited by 106
“Moreover, Donnelly et al. (2003) have demonstrated that there were clear geographic concentrations of microclusters of SARS cases where the density of infection varied widely between different districts.”
BackgroundSelf-citationThe Crystal Structure of ORF-9b, a Lipid Binding Protein from the SARS Coronavirus
Meier, C., Aricescu, A. R., Assenberg, R., Aplin, R. T., Gilbert, R. J. C., Grimes, J. M., & Stuart, D. I. (2006) · Structure · doi:10.1016/j.str.2006.05.012 · Cited by 107
SARS: clinical features and diagnosis
Hui, D. S. C., Wong, P.-C., & Wang, C. (2003) · Respirology · doi:10.1046/j.1440-1843.2003.00520.x · Cited by 106
Nishiura, H. (2007) · Emerging Themes in Epidemiology · doi:10.1186/1742-7622-4-2 · Cited by 106
“common concern for acute infectious diseases transmitted by droplets and droplet nuclei and, most noteworthily, was discussed in detail during the outbreak of severe acute respiratory syndrome (SARS) [ 30 ,31].”
BackgroundMethodInfluentialZhang, J., Xu, D., Xie, B., Zhang, Y., Huang, H., Liu, H., Chen, H., Sun, Y., Shang, Y., Hashimoto, K., et al. (2020) · Brain Behavior and Immunity · doi:10.1016/j.bbi.2020.05.075 · Cited by 106
“The reported mortality rate of COVID-19 is lower than that of severe acute respiratory syndrome (SARS) (Donnelly et al., 2003), or Middle East respiratory syndrome (MERS) (Ahmed, 2017).”
InfluentialThe pathophysiology of SARS-CoV-2: A suggested model and therapeutic approach
Morris, G., Bortolasci, C. C., Puri, B. K., OLIVE, L. S., Marx, W., O'Neil, A. E., Athan, E., Carvalho, A. F., Maes, M. H. J., Walder, K. R., et al. (2020) · Life Sciences · doi:10.1016/j.lfs.2020.118166 · Cited by 107
Epidemiological and genetic analysis of severe acute respiratory syndrome
Donnelly, C. A., Fisher, M. C., Fraser, C., Ghani, A. C., Riley, S., Ferguson, N. M., & Anderson, R. M. (2004) · The Lancet Infectious Diseases · doi:10.1016/s1473-3099(04)01173-9 · Cited by 105
Self-citationYip, T. T. C. (2004) · Clinical Chemistry · doi:10.1373/clinchem.2004.031229 · Cited by 105
“The pneumonia and accompanying adult respiratory distress syndrome can be rapidly progressive and can lead to death (2, 3 ). The most commonly used laboratory diagnostic tests for SARS-CoV infection are reverse transcription-PCR (RT-PCR) for respiratory, rectal, or stool samples and anti-SARS-CoV antibody serologic st…”
BackgroundThe Impact of Severe Acute Respiratory Syndrome on the Physical Profile and Quality of Life
Lau, H. M.-C., Lee, E. W.-C., Wong, C. N.-C., Ng, G. Y.-F., JONES, A. Y. M., & Hui, D. S. C. (2005) · Archives of Physical Medicine and Rehabilitation · doi:10.1016/j.apmr.2004.09.025 · Cited by 103
Importance of Conserved Cysteine Residues in the Coronavirus Envelope Protein
Lopez, L. A., Riffle, A. J., Pike, S. L., Gardner, D., & Hogue, B. G. (2008) · Journal of Virology · doi:10.1128/jvi.01914-07 · Cited by 107
“The emergence of severe acute respiratory syndrome coronavirus (SARS-CoV) and the recent identification of new human coronaviruses (HCoVs), HCoV-NL63 and HCoV-HKU1 ( 10 , 21), have significantly increased the importance of understanding key interactions during virus assembly, since these interactions may provide insig…”
BackgroundDrosten, C., Chiu, L.-L., Panning, M., Leong, H. N., Preiser, W., Tam, J. S. L., Günther, S., Kramme, S., Emmerich, P., Ng, W. L., et al. (2004) · Journal of Clinical Microbiology · doi:10.1128/jcm.42.5.2043-2047.2004 · Cited by 101
Reconstructing influenza incidence by deconvolution of daily mortality time series
Goldstein, E., Dushoff, J., Ma, J., Plotkin, J. B., Earn, D. J. D., & Lipsitch, M. (2009) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0902958106 · Cited by 94
Li, Y. (2004) · American Journal of Epidemiology · doi:10.1093/aje/kwh273 · Cited by 101
“(14), which were based on 57 well-defined cases in Hong Kong.”
BackgroundShi, X., Gong, E., Gao, D., Zhang, B., Zheng, J., Gao, Z., Zhong, Y., Zou, W.-Z., Wu, B., Fang, W., et al. (2005) · The American Journal of Gastroenterology · doi:10.1111/j.1572-0241.2005.40377.x · Cited by 99
Implications of human activities for (re)emerging infectious diseases, including COVID-19
Nundu, S. S., Calliope, A. S., Simpson, S. V., Arima, H., Ito, H., Nishimura, T., & Yamamoto, T. (2020) · Journal of PHYSIOLOGICAL ANTHROPOLOGY · doi:10.1186/s40101-020-00239-5 · Cited by 113
Metadata
- Authors
- Donnelly, C. A., Ghani, A. C., Leung, G. M., Hedley, A. J., Fraser, C., Riley, S., Abu-Raddad, L. J., Ho, L.-M., Thach, T.-Q., Chau, P., Chan, K.-P., Lam, T.-H., Tse, L.-Y., Tsang, T., Liu, S.-H., Kong, J. H., Lau, E. M., Ferguson, N. M., & Anderson, R. M.
- Affiliations
- Imperial College London (GB)
- University of Hong Kong (HK)
- Department of Health (CN)
- Hospital Authority (HK)
- Chinese University of Hong Kong (HK)
- ORCID
- Venue
- The Lancet
- Publisher
- Elsevier BV
- Published
- 2003-05
- Volume
- 361
- Issue
- 9371
- Pages
- 1761-1766
- ISSN
- 0099-5355 (ISSN-L)
- 0140-6736
- PMC
- PMC7112380
- OpenAlex
- W1990049863
- Cited by
- 940
- References
- 3
- Citations by year
- 2026: 5 · 2025: 8 · 2024: 15 · 2023: 18 · 2022: 39 · 2021: 93 · 2020: 154 · 2019: 18 · 2018: 5 · 2017: 10 · 2016: 15 · 2015: 17 · 2014: 15 · 2013: 20 · 2012: 9
- FWCI
- 71.19
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Lancet (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- The HKU Scholars Hub (University of Hong Kong) (submittedVersion)
- LSHTM Research Online (London School of Hygiene and Tropical Medicine) (submittedVersion)
- Funders
- Howard Hughes Medical Institute
- Wellcome Trust
- Royal Society
- Medical Research Council
- Topics
- Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
- Health Sciences › Medicine › Infectious Diseases › Viral Infections and Outbreaks Research
- Physical Sciences › Mathematics › Modeling and Simulation › COVID-19 epidemiological studies
- Keywords
- SARS, Hong Kong SARS outbreak, incubation period, case fatality rate, age and mortality, contact tracing, quarantine, public health interventions, case clusters, infectious period
- MeSH terms
- Adolescent, Adult, Aged, Child, Child, Preschool, Disease Outbreaks, Female, Hong Kong, Humans, Infant, Male, Middle Aged, Quarantine, Incidence, Survival Rate, Likelihood Functions, Age Distribution, Disease Progression, Severe Acute Respiratory Syndrome
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