Tarun Bhatnagar, Sirshendu Chaudhuri, Manickam Ponnaiah, Pragya D Yadav, R Sabarinathan, Rima R Sahay, Faheem Ahmed, S Aswathy, Pankaj Bhardwaj, Anil Bilimale, M Santhosh Kumar, M Logaraj, Uday Narlawar, C Palanivel, Prakash Patel, Sanjay K Rai, Vartika Saxena, Arvind Singh, Jeromie Wv Thangaraj, Ashwini Agarwal, Yasir Alvi, Amoghashree, P Ashok, Dinesh Babu, Yogesh Bahurupi, Sangita Bhalavi, Priyamadhaba Behera, Priyanka Pandit Biswas, Jaykaran Charan, Nishant Kumar Chauhan, K B Chetak, Lalit Dar, Ayan Das, R Deepashree, Minakshi Dhar, Rahul Dhodapkar, T S Dipu, Mridu Dudeja, Manisha Dudhmal, Ravisekhar Gadepalli, Mahendra Kumar Garg, A V Gayathri, Akhil Dhanesh Goel, H Basavana Gowdappa, Randeep Guleria, Manoj Kumar Gupta, Farzana Islam, Mannu Jain, Vineet Jain, M Lanord Stanley Jawahar, Rajendra Joshi, Shashi Kant, Sitanshu Sekhar Kar, Deepjyoti Kalita, Meenakshi Khapre, Satyendra Khichar, Sarika Prabhakar Kombade, Sunil Kohli, Abhinendra Kumar, Anil Kumar, Deepak Kumar, Kiran G Kulirankal, K V Leela, Triparna Majumdar, Baijayantimala Mishra, Puneet Misra, Sanjeev Misra, Prasanta Raghab Mohapatra, M Narayana Murthy, Dimpal A Nyayanit, Manish Patel, Monika Pathania, Savita Patil, Binod Kumar Patro, Ramniwas, Pragati Rathod, Naimesh Shah, Anita Shete, Deepak Shukla, M Shwethashree, Smita Sinha, Ashish Surana, Anjan Trikha, A Tejashree, Mahalingam Venkateshan, G Vijaykrishnan, Sarita Wadhava, Naveet Wig, Nivedita Gupta, Priya Abraham, Manoj V Murhekar
BACKGROUND: India introduced BBV152/Covaxin and AZD1222/Covishield vaccines from January 2021. We estimated effectiveness of these vaccines against severe Coronavirus disease 2019 (COVID-19) among individuals aged ≥45 years. METHODS: We did a multi-centric, hospital-based, case-control study between May and July 2021. Cases were severe COVID-19 patients and controls were COVID-19 negative individuals from 11 hospitals. Vaccine effectiveness (VE) was estimated for full (2 doses ≥14days) and partial (1 dose ≥21 days) vaccination; duration between two vaccine doses and against the Delta variant...
July 14, 2022: International Journal of Infectious Diseases: IJID