Over 18 percent of Linn County’s adult population and over 21 percent of Johnson County’s have been fully vaccinated against COVID-19, the state reported Sunday on the three-month anniversary of the first doses administered in Iowa.Since the first COVID-19 inoculations on Dec. 14, 2020, 408,911 Iowans have completed either the one-dose or two-dose requirement, data showed Sunday.That includes 31,470 Linn County residents and 25,932 Johnson County residents.The total number of doses administered by providers in Iowa over the last three months hit 1,105,700 on Sunday, an increase of 28,820.Deaths Though the number of vaccinations continued ramping up, the state Sunday confirmed another eight COVID-19 deaths — half of them from February and half from March so far.Polk and Wapello counties each reported two of the deaths.