The Safety of Covishield (ChAdOx1 nCoV-19) Vaccine after Three Doses Vaccination under Mass Vaccination Program of Government of India

Abstract

Aims and objectives:In coronavirus disease-2019 (COVID-19) disease, there is no antiviral drugs, hence, Covishield vaccination is the best way of prevention. In India, after two doses of vaccination drive, there has been reports of adverse drug events (ADEs) but there has been creation of misinformation about the safety of the vaccine in some reports. Only few studies are available to monitor the ADEs after the third dose of COVID-19 vaccine. Therefore, this study was planned to establish the safety of Covishield vaccine after three doses. Materials and methods: An observational, non-interventional, retrospective study based on surveillance was conducted to assess the safety of Covishield vaccine after three doses. The vaccine was given by