New Delhi: Delhi Health Minister Satyendar Jain on Thursday asserted that the city government's home isolation policy was a "successful model" and had it not been implemented, it would not have been possible to handle such a massive surge in COVID-19 cases at present.Delhi recorded its biggest single-day jump of 8,593 COVID-19 cases on Wednesday that took its infection tally to over 4.59 lakh, while 85 new fatalities pushed the national capital's death toll to 7,228, authorities said.When asked about the huge spike in daily cases and deaths, Jain told reporters that the number of tests have been trebled at present, compared to the corresponding figures when the second peak had hit Delhi in mid-September, when over 4,000 daily cases were.