anitbiodies that specifically target the Covid-19 virus (Sars-CoV-2) from entering human cells were lower against the Delta variant as compared to the B1 variant that led to the first Covid wave in the country.
As compared to B1, the neutralising antibody titres against the Delta variant were 78% less in those who received one Covid jab, 69% in those who received two shots of Covishield, 66% in those who had the infection and received one shot, and 38% in those who had the infection and received both shots.
The daily quoted Dr T Jacob John, former head of the department of microbiology at Christian Medical College-Vellore and said, "Not observed is not equivalent to not present".