{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T23:29:53Z","timestamp":1778887793544,"version":"3.51.4"},"reference-count":6,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2021,3,26]],"date-time":"2021-03-26T00:00:00Z","timestamp":1616716800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Trop Doct"],"published-print":{"date-parts":[[2021,7]]},"abstract":"<jats:p>COVID-19 has been found to be highly infectious with a high secondary attack rate with a R0 of 3.3. However, the secondary attack rate based on risk stratification is sparsely reported, if ever. We studied the contact tracing data for two index cases of COVID-19 with some overlap of contacts. We found that 60% of high-risk contacts and 0% of low-risk contacts of symptomatic COVID-19 patients contracted the infection, in keeping with the Kerala government contact risk stratification guidelines.<\/jats:p>","DOI":"10.1177\/00494755211002012","type":"journal-article","created":{"date-parts":[[2021,3,26]],"date-time":"2021-03-26T04:14:51Z","timestamp":1616732091000},"page":"461-463","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["A comparison of COVID-19 secondary attack rate in household and close contacts compared to current risk stratification guidelines of the Kerala government"],"prefix":"10.1177","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5630-704X","authenticated-orcid":false,"given":"Balram","family":"Rathish","sequence":"first","affiliation":[{"name":"Clinical Fellow, Department of Infectious Diseases, Aster Medcity, Kochi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arun","family":"Wilson","sequence":"additional","affiliation":[{"name":"Specialist, Department of Infectious Diseases, Aster Medcity, Kochi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sonya","family":"Joy","sequence":"additional","affiliation":[{"name":"Consultant, Department of Infection Control and Clinical Microbiology, Aster Medcity, Kochi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2021,3,26]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.3961\/jpmph.20.076"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1093\/cid\/ciaa450"},{"key":"e_1_3_2_4_2","unstructured":"https:\/\/dhs.kerala.gov.in\/wp-content\/uploads\/2020\/08\/1598163078157_Guideline-COVID-19-Contact-Tracing-High-Risk-Low-Risk-and-Quarantine.pdf (accessed 27 August 2020)."},{"key":"e_1_3_2_5_2","unstructured":"https:\/\/dhs.kerala.gov.in\/wp-content\/uploads\/2020\/08\/1597486460508_COVID-19-Revised-Testing-Guidelines-15th-August-2020.pdf (accessed 27 August 2020)."},{"key":"e_1_3_2_6_2","doi-asserted-by":"crossref","unstructured":"Shah K Saxena D and Mavalankar D. Secondary attack rate of COVID-19 in household contacts: a systematic review. QJM [Internet]. https:\/\/academic.oup.com\/qjmed\/advance-article\/doi\/10.1093\/qjmed\/hcaa232\/5877952 (accessed 28 October 2020).","DOI":"10.1093\/qjmed\/hcaa232"},{"key":"e_1_3_2_7_2","unstructured":"https:\/\/dhs.kerala.gov.in\/wp-content\/uploads\/2020\/10\/Technical-Paper-COVID-19-ICMR-Sero-Surveillance-Study.docx.pdf (accessed 28 October 2020)."}],"container-title":["Tropical Doctor"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/00494755211002012","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/00494755211002012","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/00494755211002012","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T13:33:12Z","timestamp":1777642392000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/00494755211002012"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,26]]},"references-count":6,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2021,7]]}},"alternative-id":["10.1177\/00494755211002012"],"URL":"https:\/\/doi.org\/10.1177\/00494755211002012","relation":{},"ISSN":["0049-4755","1758-1133"],"issn-type":[{"value":"0049-4755","type":"print"},{"value":"1758-1133","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,26]]}}}