Predominance of delta variant among the COVID-19 vaccinated and unvaccinated individuals, India, May 2021

Published:August 05, 2021DOI:


      • Vaccine breakthrough SARS-CoV-2 infections were reported during COVID-19 second wave in India.
      • Prevalence of Delta (B.1.617.2) variant was not different between the vaccinated and unvaccinated groups.
      • Progression of COVID-19 cases to severe illness and mortality was lower in the vaccinated as compared to unvaccinated group.


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