The October round of monthly sero-prevalance survey in the national capital, which got delayed earlier, has started, officials told PTI.
The last survey was held from Sept. 1-7 to better assess the Covid-19 situation here and formulate combat strategies.
The exercise was slated to begin from Oct. 1, but got delayed as the results of the survey done last month was presented to the Delhi High Court on Sept. 30.
This month’s survey began from Oct. 15. A total of 15,164 samples will be taken, an official source said.
The national capital recorded 22 Covid-19 fatalities on Friday, as the toll mounted to 5,946 while 3,428 fresh cases took the tally to over 3.24 lakh, authorities said.
Delhi Health Minister, Satyendar Jain, in a media briefing, said the overall case fatality is 1.83%.
Later in a Facebook post, he also said that the sero-prevalance survey for October month began on Thursday.
The September survey had found that sero-prevalence of antibodies to Covid-19 had reduced to 25% from nearly 29% recorded in the August exercise, among people in the national capital, the Delhi High Court was informed.
The September survey also found that nearly one-third of the participants with a past history of Covid-19 infection “did not have detectable IgG antibodies”.
“However, there is evidence that antibodies to Covid-19 may deplete over time,” it added.
Sample size in the last month’s exercise was about 17,000.