Nearly 40 per cent of people who contracted Covid-19 and got cured in Ahmedabad, covered in the second sero-surveillance by the Ahmedabad Municipal Corporation (AMC), one-and-a-half months after the first such study, showed no presence of Covid-19 antibodies. The surveillance also concluded that there is no herd immunity yet.
The study of of 10,310 samples showed sero-positivity in 23.24 per cent, which is nearly 5.63 per cent higher than the survey…