There have been some media reports alleging that genome sequencing and analysis of the COVID19 declined sharply in India even as cases of the disease continued to rise. The report further claims that the country sequenced very low number of samples till date. COVID-19 Myths vs Facts: Genome Sequencing by INSACOG Progressively Increased, Govt Refutes […]

New Delhi Aug 31 PTI A little more than 25 per cent of healthcare workers were infected with coronavirus despite getting fully jabbed a recent study has revealed giving an insight on the breakthrough infections due to the Delta variant The study jointly conducted by the Institute of Genomics and Integrative Biology IGIB and Max hospitals in Delhi-NCR found that vaccination breakthroughs were far more common during the Delta-outbreak in Delhi than previously reported However the severity of the infection was low and vaccination is crucial to avoid severe illnesses said Shantanu Sengupta senior scientist with the IGIB and one of the lead researchers of the study He also cautioned that of the 25 per cent who were infected a large number were asymptomatic so masking is also very important to arrest the spread of infection Sengupta said nearly 95 healthcare workers who had taken the two doses were studied They were assessed from 45-90 days after their inoculation Of the 95 more than 25 per cent saw breakthrough infections Immunisation is expected to confer protection against infection and severe disease for vaccines while reducing risks to non-immunised population by inhibiting transmission Here based on serial serological studies we show that during a severe SARS-CoV2 Delta-variant outbreak in Delhi 253 per cent of previously uninfected ChAdOx1-nCoV19 Covishield double vaccinated healthcare-workers HCW were infected within a period of less than two months based on serology the study said Most infections were unrecognised The Delta- variant thus causes frequent unrecognised breakthrough infections in adequately immunised subjects reducing any herd-effect of immunity and requiring reinstatement of preventive measures such as masking the paper said There is a need to have a variant-specific high throughput neutralisation assay to truly assess population immunity and predict outbreak risk it said PTI PR ZMN ZMN