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A recent study has found that more than 25% of healthcare workers in Delhi were found to be infected by the Covid-19 virus despite being fully vaccinated. The research was conducted jointly by the Institute of Genomics and Integrative Biology (IGIB) and Max Hospitals in Delhi-NCR. It has been observed in the study that breakthroughs in vaccinations were more common during the surge of the Delta variant of the virus in Delhi.

Shantanu Sengupta, senior IGIB scientist and lead researcher said, "The severity of the infection was low and vaccination is crucial to avoid severe illnesses. As many as 95 healthcare workers who had taken the two doses were assessed from 45-90 days after their inoculation, and over 25 per cent saw breakthrough infections."  

The study revealed, as reported by news agency IANS, "While 52 per cent of subjects (n309) had been previously infected with SARS-CoV-2, based on the presence of antibodies to SARS-CoV2 proteins, it was found that there was a robust immunogenic response to two doses of vaccine, irrespective of prior infection. Amongst fully vaccinated and uninfected HCWs, the breakthrough infection prevalence on day 90 was 25.3 per cent."