Download PDF Covishield™ (ChAdOx1) vaccine effectiveness and epidemiological risk factors of COVID-19 infection among frontline workers during second wave of COVID-19 pandemic, New Delhi: A case–control study  This is a temporary file and hence do not link it from a website, instead link the URL of this page if you wish to link the PDF file. To read this article you will require Adobe© Acrobat Reader, if you do not have this installed you can download it from here Support open access Recommend
 | Subscribe
  |
|