More than 21% of the New York City residents given coronavirus antibody tests earlier this week tested positive, Gov. Andrew Cuomo said Thursday. Monday marked the start of a statewide initiative to test 3,000 New Yorkers for the presence of antibodies, which are made in response to viral infections. The preliminary results mean that one in five of the city residents tested have had coronavirus and developed the antibodies to fight it. Across the state, 13.9% of the individuals tested were positive for antibodies, Cuomo told reporters at a daily news briefing. New York state is the epicenter of the U.S. outbreak of the novel coronavirus that causes COVID-19, with more than 250,000 cases and more than 19,000 fatalities,according to data aggregated by Johns Hopkins University.