Delhi sero-survey: One-fourth of samples to be taken from those above 50

The fresh exercise is being undertaken for a comprehensive assessment of the Covid-19 situation in Delhi, officials said

The new sero-prevalence survey in the national capital will exclude those who were part the previous exercise and 25 per cent of the fresh samples in all districts will be taken from persons aged 50 and above, according to a standard operating procedure prescribed for it.

As per the SOP for the survey that began on Saturday, each sample collection team is to collect 25-40 samples a day.

"All districts are to ensure that out of total number of samples, 25 per cent are of those younger than 18 years of age, another 50 per cent are in the age group of