SAN ANTONIO – Two more health care workers from University Hospital have tested positive for COVID-19, according to University Health System (UHS). The hospital said a nurse and a resident physician have tested positive for coronavirus following travel exposure. Earlier this week, the hospital announced a resident physician had tested positive and was quarantined. These tracers and calls are currently underway,” University Health System said in the statement. COVID-19, the respiratory disease caused by the new virus, stands for coronavirus disease 2019.