Kolandaswamy Karumanagoundar, Mohankumar Raju, Manickam Ponnaiah, Prabhdeep Kaur, Vidhya Viswanathan, Polani Rubeshkumar, Manikandanesan Sakthivel, Porchelvan Shanmugiah, Parasuraman Ganeshkumar, 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, T S Selvavinayagam, Madhusudhan Reddy, Beela Rajesh, Manoj V Murhekar
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 study SETTING 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...
November 5, 2021: BMJ Open