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Secondary attack rate of COVID-19 among contacts and risk factors, Tamil Nadu, March-May 2020: a retrospective cohort study.
Karumanagoundar K, Raju M, Ponnaiah M, Kaur P, Viswanathan V, Rubeshkumar P, Sakthivel M, Shanmugiah P, Ganeshkumar P, Muthusamy SK, Sendhilkumar M, Venkatasamy V, Sambath I, Ilangovan K, Murugesan J, Govindarajan R, Shanmugam S, Rajarathinam S, Suresh K, Varadharajan M, Thiagarajan M, Jagadeeshkumar K, Ganesh V, Kumar S, Venkatesan P, Nallathambi Y, Palani S, Selvavinayagam TS, Reddy M, Rajesh B, Murhekar MV. Karumanagoundar K, et al. Among authors: varadharajan m. BMJ Open. 2021 Nov 5;11(11):e051491. doi: 10.1136/bmjopen-2021-051491. BMJ Open. 2021. PMID: 34740930 Free PMC article.