Breakthrough COVID-19 Infections Found In 25 Per Cent Healthcare Staff: Study

New Delhi: 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.

Also Read: Covid Third Wave Could Peak Between October And November; Intensity Expected To Be One-Fourth Of Second Wave

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. Mr 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, 25.3 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.

Also Read: New Variant (C.1.2) Of Coronavirus May Be More Infectious, Evade Vaccines: Study

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

NDTV – Dettol Banega Swasth India campaign is an extension of the five-year-old Banega Swachh India initiative helmed by Campaign Ambassador Amitabh Bachchan. It aims to spread awareness about critical health issues facing the country. In wake of the current COVID-19 pandemic, the need for WASH (Water, Sanitation and Hygiene) is reaffirmed as handwashing is one of the ways to prevent Coronavirus infection and other diseases. The campaign highlights the importance of nutrition and healthcare for women and children to prevent maternal and child mortality, fight malnutrition, stunting, wasting, anaemia and disease prevention through vaccines. Importance of programmes like Public Distribution System (PDS), Mid-day Meal Scheme, POSHAN Abhiyan and the role of Aganwadis and ASHA workers are also covered. Only a Swachh or clean India where toilets are used and open defecation free (ODF) status achieved as part of the Swachh Bharat Abhiyan launched by Prime Minister Narendra Modi in 2014, can eradicate diseases like diahorrea and become a Swasth or healthy India. The campaign will continue to cover issues like air pollution, waste management, plastic ban, manual scavenging and sanitation workers and menstrual hygiene.