NEW DELHI : Authorities in Delhi on Saturday started a mammoth task of conducting a serological survey to comprehensively analyse the spread of COVID-19 as the number of cases in the national capital crossed the 80,000 mark.Delhi Chief Minister Arvind Kejriwal acknowledged that since there was a shortage of beds in hospitals for COVID-19 patients in the first week of June, the death toll due to coronavirus had started rising in the national capital, but asserted that there is no such deficiency as of now.Addressing an online briefing, Chief Minister Arvind Kejriwal asserted that there is no shortage of beds for COVID-19 patients in Delhi as of now, saying his government has significantly raised the number of beds in the past one month and.