Residents should self-test on Sunday using antigen kits and report any positive results, Shanghai government officials told a news conference, while a nucleic acid test would be conducted citywide on Monday. Hong Kong health authorities report 3,709 new COVID cases Hong Kong health authorities reported 3,709 new COVID-19 cases on Sunday, down from 4,475 the previous day, and 111 deaths as infections in the global financial hub continue to drop.