The Covishield vaccine effectiveness of complete vaccination against moderate-to-severe COVID disease was 81 percent. This is as per study published in journal – The Lancet Infectious Diseases. Science and Technology Ministry said, this study provides the comprehensive data on the real-world vaccine effectiveness and immunological response to vaccination.<br />''<br />''According to the study, which included comparison between two thousand 379 cases of confirmed SARS-CoV-2 infection and one thousand 981 controls, the vaccine effectiveness in fully vaccinated individuals was found to be 63 per cent.<br />''<br />''As per the WHO statistics, SARS-CoV-2 has affected more than two hundred million people causing more than five million deaths worldwide. <br />