Single-dose of Covishiedl is 61% effective against delta!
He added that the decision to increase the period between two Covishield doses from six to twelve to sixteen weeks was based on scientific study, and that members of the National Technical Advisory Group on Immunization did not oppose. On the topic of single-dose vs. two-dose protection, Arora described how NTAGI was considering new research and studies on the efficacy of partial vs. full vaccination.
PGI chandigarh conducted a study that evaluated the efficacy of partial vs complete vaccination. Research from PGI chandigarh found that vaccination efficacy was 75 per cent for both partly and completely vaccinated people. So, in the near term, it didn't matter whether you were partly or completely vaccinated. This was in reference to the Alpha strain, which had ravaged punjab and northern india before making its way to Delhi. It was also ensured that with one dose itself we are immunised from the virus.