Effectiveness of ChAdOx1 nCoV-19 vaccine against SARS-CoV-2 infection during the delta (B.1.617.2) variant surge in India: a test-negative, case-control study and a mechanistic study of post-vaccination immune responses

Ramachandran Thiruvengadam, Amit Awasthi, Guruprasad Medigeshi, Sankar Bhattacharya, Shailendra Mani, Sridhar Sivasubbu, Tripti Shrivastava, Sweety Samal, Deepika Rathna Murugesan, Bapu Koundinya Desiraju, Pallavi Kshetrapal, Rajesh Pandey, Vinod Scaria, Praveen Kumar Malik, Juhi Taneja, Akshay Binayke, Tarini Vohra, Aymaan Zaheer, Deepak Rathore, Naseem Ahmad Khan, Heena Shaman, Shubbir Ahmed, Rajesh Kumar, Suprit Deshpande, Chandru Subramani, Nitya Wadhwa, Nimesh Gupta, Anil K Pandey, Jayanta Bhattacharya, Anurag Agrawal, Sudhanshu Vrati, Shinjini Bhatnagar, Pramod Kumar Garg