ORANGE COUNTY, Fla. – COVID-19 antibody testing is underway at the Orange County Convention Center after a slight delay due to missing testing equipment, according to a testing site official. She said the first day of antibody testing for frontline workers had a rocky start. She said antibody testing was initially delayed because the site did not get a shipment of blood tubes needed to conduct the tests. A few hours after the testing site opened, Luna said they got the equipment they needed and immediately started testing. The convention center site can test 80 people a day.