Sub-optimal neutralisation of omicron (B.1.1.529) variant by antibodies induced by vaccine alone or SARS-CoV-2 Infection plus vaccine (hybrid immunity) post 6-months oleh Guruprasad R Medigeshi, Gaurav Batra, Deepika Rathna Murugesan, Ramachandran Thiruvengadam, Souvick Chattopadhyay, Bhabatosh Das, Mudita Gosain, Ayushi, Janmejay Singh, Anantharaj Anbalagan, Heena Shaman, Kamal Pargai, Farha Mehdi, Soon Jyoti Das, Namrata Kahlon, Savita Singh, Pallavi Kshetrapal, Nitya Wadhwa, Anil K Pandey, Shinjini Bhatnagar, Pramod Kumar Garg