Covishield was effective against Covid in India amid Delta-led surge: Study

The vaccine effectiveness of complete vaccination against moderate-to-severe disease was much higher at 81%, says Lancet study

The findings of a new study show the real-world vaccine effectiveness of Covishield against SARS-CoV-2 during the second wave of the Covid pandemic between April and May this year was 63% in India, the Ministry of Science & Technology said.

The study, published in The Lancet Infectious Diseases, was carried out by a multi-institutional team of Indian researchers led by Translational Health Science and Technology Institute (THSTI). 

The effectiveness of complete vaccination through Covishield against moderate-to-severe Covid-19 was much higher at 81%, the study found. The vaccination programme in India is driven largely by Covishield.

The researchers employed a comparison