Covid recovered with one/two dose can protect against Delta variant: Study
Breakthrough cases COVID-19 recovered individuals with one or two doses of vaccine have relatively higher protection against Delta variant in comparison to those administered either one or two doses of Covishield, a study stated.
Prior vaccination results in less severe disease against subsequent infection provide evidence that both humoral cellular immune response play an important role in protection, according to the study which is yet to be peer-reviewed was posted on bioRxiv preprint server on Friday.
The study ‘Neutralisation of Delta Variant with Sera of Covishield vaccines COVID-19 Recovered Vaccinated Individuals’ has been done by scientists from the Indian Council of Medical Research (ICMR), National Institute of Virology, Pune, Department of Neurosurgery, CommHospital (Southern Command), Armed Forces Medical College, Pune.
The recent emergence of B.1.617 lineage has created grave public health problem in India.
The lineage further mutated to generate sub-lineages B.1.617.1 (Kappa), B.1.617.2 (Delta) B.1.617.3. Apparently, the Delta variant has slowly dominated the other variants. With this, the World Health Organisation has described this sub-lineage as variant of concern, the study stated.
“The high transmissibility associated with Delta variant led to second wave of the pandemic in India which affected millions of people. Besides this, variant of concerns have been reported to show lower neutralisation to several approved vaccines. This has led to breakthrough infections after completion of vaccination regimen,” it said.
There is limited information available on the duration of protective immune response post-infection, vaccination or breakthrough infection with SARS-CoV-2.
The study evaluated immune response in sera of the Covishield vaccinated individuals belonging to categories– one dose vaccinated, two doses vaccinated, COVID-19 recovered plus one dose vaccinated, COVID-19 recovered plus two doses vaccinated breakthrough COVID-19 cases.
“The findings of the study demonstrated that the breakthrough cases COVID-19 recovered individuals with one or two dose of vaccine had relatively higher protection against Delta variant in comparison to the participants who were administered either one or two doses of Covishield.
“Prior vaccination results in less severe disease against subsequent infection provide evidence that both humoral cellular immune response play an important role in protection,” the study added.
(Only the headline picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)