Nature Communications (Apr 2022)

High failure rate of ChAdOx1-nCoV19 immunization against asymptomatic infection in healthcare workers during a Delta variant surge

  • Rajat Ujjainiya,
  • Akansha Tyagi,
  • Viren Sardana,
  • Salwa Naushin,
  • Nitin Bhatheja,
  • Kartik Kumar,
  • Joydeb Barman,
  • Satyartha Prakash,
  • Rintu Kutum,
  • Akash Kumar Bhaskar,
  • Prateek Singh,
  • Kumardeep Chaudhary,
  • Menka Loomba,
  • Yukti Khanna,
  • Chestha Walecha,
  • Rizwan Ahmed,
  • Ashutosh Yadav,
  • Archana Bajaj,
  • Gaurav Malik,
  • Sahar Qureshi,
  • Swati Waghdhare,
  • Samreen Siddiqui,
  • Kamal Krishan Trehan,
  • Manju Mani,
  • Rajiv Dang,
  • Poonam Das,
  • Pankaj Dougall,
  • Monica Mahajan,
  • Sudipta Sonar,
  • Kamini Jakhar,
  • Reema Kumar,
  • Mahima Tiwari,
  • Shailendra Mani,
  • Sankar Bhattacharyya,
  • Sandeep Budhiraja,
  • Anurag Agrawal,
  • Debasis Dash,
  • Sujeet Jha,
  • Shantanu Sengupta

DOI
https://doi.org/10.1038/s41467-022-29404-3
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 6

Abstract

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The authors study a cohort of healthcare workers in India who received two doses of the ChAdOx-1-nCoV19 vaccine during the Delta wave. Using serological data, they infer that 25% of the cohort were infected within 60 days of vaccination, although there were no severe infections leading to hospitalisations.