Govt’s 4-week gap for Serum jab may lead to lower efficacy3 min read . Updated: 14 Jan 2021, 09:49 PM IST
- Vaccine experts say that 53% efficacy for two full doses given less than six weeks apart is just slightly above the threshold of 50%, but even that is not enough to meet the statistical criteria to generate enough confidence
The government’s decision to administer the second dose of Covishield vaccine just four weeks after the first may lead to efficacy of just 53%, the vaccine’s package insert showed. This is slightly above the cut-off of 50%, though a longer gap of at least 12 weeks would have raised the efficacy to as much as 79%.
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