SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020-January 2021.
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Murhekar Manoj V, Bhatnagar Tarun, Thangaraj Jeromie Wesley Vivian, Saravanakumar V, Kumar Muthusamy Santhosh, Selvaraju Sriram, Rade Kiran, Kumar C P Girish, Sabarinathan R, Turuk Alka, Asthana Smita, Balachandar Rakesh, Bangar Sampada Dipak, Bansal Avi Kumar, Chopra Vishal, Das Dasarathi, Deb Alok Kumar, Devi Kangjam Rekha, Dhikav Vikas, Dwivedi Gaurav Raj, Khan S Muhammad Salim, Kumar M Sunil, Laxmaiah Avula, Madhukar Major, Mahapatra Amarendra, Rangaraju Chethana, Turuk Jyotirmayee, Yadav Rajiv, Andhalkar Rushikesh, Arunraj K, Bharadwaj Dinesh Kumar, Bharti Pravin, Bhattacharya Debdutta, Bhat Jyothi, Chahal Ashrafjit S, Chakraborty Debjit, Chaudhury Anshuman, Deval Hirawati, Dhatrak Sarang, Dayal Rakesh, Elantamilan D, Giridharan Prathiksha, Haq Inaamul, Hudda Ramesh Kumar, Jagjeevan Babu, Kalliath Arshad, Kanungo Srikanta, Krishnan Nivethitha N, Kshatri Jaya Singh, Kumar Alok, Kumar Niraj, Kumar V G Vinoth, Lakshmi G G J Naga, Mehta Ganesh, Mishra Nandan Kumar, Mitra Anindya, Nagbhushanam K, Nimmathota Arlappa, Nirmala A R, Pandey Ashok Kumar, Prasad Ganta Venkata, Qurieshi Mariya Amin, Reddy Sirasanambatti Devarajulu, Robinson Aby, Sahay Seema, Saxena Rochak, Sekar Krithikaa, Shukla Vijay Kumar, Singh Hari Bhan, Singh Prashant Kumar, Singh Pushpendra, Singh Rajeev, Srinivasan Nivetha, Varma Dantuluri Sheethal, Viramgami Ankit, Wilson Vimith Cheruvathoor, Yadav Surabhi, Yadav Suresh, Zaman Kamran, Chakrabarti Amit, Das Aparup, Dhaliwal R S, Dutta Shanta, Kant Rajni, Khan A M, Narain Kanwar, Narasimhaiah Somashekar, Padmapriyadarshini Chandrasekaran, Pandey Krishna, Pati Sanghamitra, Patil Shripad, Rajkumar Hemalatha, Ramarao Tekumalla, Sharma Y K, Singh Shalini, Panda Samiran, Reddy D C S, Bhargava Balram, ICMR Serosurveillance Group
Аннотация
METHODS: The third serosurvey was conducted in the same 70 districts as the first and second serosurveys. For each district, at least 400 individuals aged ≥10 years from the general population and 100 HCWs from subdistrict-level health facilities were enrolled. Serum samples from the general population were tested for the presence of immunoglobulin G (IgG) antibodies against the nucleocapsid (N) and spike (S1-RBD) proteins of SARS-CoV-2, whereas serum samples from HCWs were tested for anti-S1-RBD. Weighted seroprevalence adjusted for assay characteristics was estimated.
RESULTS: Of the 28,598 serum samples from the general population, 4585 (16%) had IgG antibodies against the N protein, 6647 (23.2%) had IgG antibodies against the S1-RBD protein, and 7436 (26%) had IgG antibodies against either the N protein or the S1-RBD protein. Weighted and assay-characteristic-adjusted seroprevalence against either of the antibodies was 24.1% [95% confidence interval (CI) 23.0-25.3%]. Among 7385 HCWs, the seroprevalence of anti-S1-RBD IgG antibodies was 25.6% (95% CI 23.5-27.8%).
CONCLUSIONS: Nearly one in four individuals aged ≥10 years from the general population as well as HCWs in India had been exposed to SARS-CoV-2 by December 2020.