| Autor: |
Prabhdeep Kaur, Parasuraman Ganeshkumar, Kolandaswamy Karumanagoundar, Mohankumar Raju, Manickam Ponnaiah, Vidhya viswanathan, Polani Rubeshkumar, Manikandanesan Sakthivel, Porchelvan Shanmugiah, Santhosh Kumar Muthusamy, Muthappan Sendhilkumar, Vettrichelvan Venkatasamy, Irene Sambath, Kumaravel Ilangovan, Jagadeesan Murugesan, Rameshkumar Govindarajan, Soundammal Shanmugam, Selvakumar Rajarathinam, KST Suresh, M Varadharajan, Manivannan Thiagarajan, K Jagadeeshkumar, Velmurugan Ganesh, Sateesh Kumar, Prakash Venkatesan, Yogananth Nallathambi, Sampath Palani, TS Selvavinayagam, Madhusudhan Reddy, Beela Rajesh, Manoj V Murhekar |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
BMJ Open, Vol 11, Iss 11 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2044-6055 |
| DOI: |
10.1136/bmjopen-2021-051491 |
| Popis: |
Objective To describe the characteristics of contacts of patients with COVID-19 case in terms of time, place and person, to calculate the secondary attack rate (SAR) and factors associated with COVID-19 infection among contacts.Design A retrospective cohort studySetting and participants Contacts of cases identified by the health department from 14 March 2020to 30 May 2020, in 9 of 38 administrative districts of Tamil Nadu. Significant proportion of cases attended a religious congregation.Outcome measure Attack rate among the contacts and factors associated with COVID-19 positivity.Results We listed 15 702 contacts of 931 primary cases. Of the contacts, 89% (n: 14 002) were tested for COVID-19. The overall SAR was 4% (599/14 002), with higher among the household contacts (13%) than the community contacts (1%). SAR among the contacts of primary cases with congregation exposure were 5 times higher than the contacts of non-congregation primary cases (10% vs 2%). Being a household contact of a primary case with congregation exposure had a fourfold increased risk of getting COVID-19 (relative risk (RR): 16.4; 95% CI: 13 to 20) than contact of primary case without congregation exposure. Among the symptomatic primary cases, household contacts of congregation primaries had higher RR than household contacts of other cases ((RR: 25.3; 95% CI: 10.2 to 63) vs (RR: 14.6; 95% CI: 5.7 to 37.7)). Among asymptomatic primary case, RR was increased among household contacts (RR: 16.5; 95% CI: 13.2 to 20.7) of congregation primaries compared with others.Conclusion Our study showed an increase in disease transmission among household contacts than community contacts. Also, symptomatic primary cases and primary cases with exposure to the congregation had more secondary cases than others. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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