More than 1.5 million doses of the COVID-19 vaccines have been administered in Iowa since Dec. 14, 2020, when the first Pfizer and Moderna vaccines were administered to health care workers in the state.As of 1:30 p.m. Wednesday, 1,515,826 vaccine doses had been administered in the state — an increase of 27,670 from Tuesday — with 1,459,906 shots going to Iowa residents, according to the Iowa Department of Public Health.