16% showed no antibodies against the Delta variant, after two doses of Covishield: ICMR Study
Antibodies against the delta variant could not be detected in 16.1% of the sample population, according to an ICMR study;
According to a yet-to-be-peer reviewed study published in the bioRxiv, 16.1 % of people who were administered both the doses of Covishield were devoid of neutralizing antibodies towards the Delta variant (B1.617.2) of COVID-19.
Due to its high transmissibility, the Delta variant (B.1.617.2) was responsible for India's deadly second wave, which affected lakhs of people. It has emerged as one of the dominant variants and has now been detected in over 100 other countries. Along with this, it has been reported that it shows lower neutralization to many of the approved vaccines, which has led to many getting infected even after completion of the vaccine regimen.
A study was conducted by researchers at ICMR wherein they investigated the immunological response in sera of the Covishield vaccinated individuals belonging to the following category:
- Partially vaccinated
- Completely vaccinated
- COVID-19 recovered plus one dose vaccinated
- COVID-19 recovered plus two doses vaccinated
- Breakthrough COVID-19 cases.
The findings of the study are as follows:
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