Covaxin doses 50% effective against symptomatic Covid: Real-world study

Research does not estimate vaccine effectiveness against hospitalisation, severe disease, and death.

As an independent study by researchers based on real world assessment showed that Bharat Biotech’s Covaxin to be 50 per cent effective against symptomatic Covid-19 disease, experts say more real-world studies are required now. Real-world data, however, shows that vaccines are working against severe disease and hospitalisation, claimed experts.

The study titled ‘Effectiveness of an inactivated virus-based SARS-CoV-2 vaccine, BBV152, in India: a test-negative, case-control study’ assessed 2,714 hospital workers at the All India Institute of Medical Sciences (AIIMS) in Delhi, between April 15 and May 15. The workers were symptomatic and underwent RT-PCR test for Covid-19 detection. The results