Title |
Epidemiology and transmission dynamics of COVID-19 in two Indian states
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Published in |
Science, September 2020
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DOI | 10.1126/science.abd7672 |
Pubmed ID | |
Authors |
Ramanan Laxminarayan, Brian Wahl, Shankar Reddy Dudala, K. Gopal, Chandra Mohan B, S. Neelima, K. S. Jawahar Reddy, J. Radhakrishnan, Joseph A. Lewnard |
Abstract |
Although most cases of coronavirus disease 2019 (COVID-19) have occurred in low-resource countries, little is known about the epidemiology of the disease in such contexts. Data from the Indian states of Tamil Nadu and Andhra Pradesh provide a detailed view into severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission pathways and mortality in a high-incidence setting. Reported cases and deaths have been concentrated in younger cohorts than would be expected from observations in higher-income countries, even after accounting for demographic differences across settings. Among 575,071 individuals exposed to 84,965 confirmed cases, infection probabilities ranged from 4.7 to 10.7% for low-risk and high-risk contact types, respectively. Same-age contacts were associated with the greatest infection risk. Case fatality ratios spanned 0.05% at ages of 5 to 17 years to 16.6% at ages of 85 years or more. Primary data from low-resource countries are urgently needed to guide control measures. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 580 | 11% |
United Kingdom | 409 | 8% |
Spain | 219 | 4% |
France | 149 | 3% |
India | 130 | 3% |
Canada | 115 | 2% |
Germany | 86 | 2% |
Argentina | 83 | 2% |
Peru | 78 | 2% |
Other | 672 | 13% |
Unknown | 2588 | 51% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 4348 | 85% |
Scientists | 443 | 9% |
Practitioners (doctors, other healthcare professionals) | 207 | 4% |
Science communicators (journalists, bloggers, editors) | 110 | 2% |
Unknown | 1 | <1% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 546 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 85 | 16% |
Student > Master | 52 | 10% |
Student > Ph. D. Student | 49 | 9% |
Student > Bachelor | 43 | 8% |
Other | 27 | 5% |
Other | 102 | 19% |
Unknown | 188 | 34% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 100 | 18% |
Nursing and Health Professions | 35 | 6% |
Biochemistry, Genetics and Molecular Biology | 30 | 5% |
Agricultural and Biological Sciences | 28 | 5% |
Social Sciences | 21 | 4% |
Other | 110 | 20% |
Unknown | 222 | 41% |