By William CrumStaff writerwcrum@oklahoman.comA public health official said predictive modeling shows local herd immunity to COVID-19 could be achieved in June. The announcement came Tuesday as the Oklahoma City Council passed a mask ordinance extension. Phil Maytubby, the Oklahoma City-County Health Department chief operating officer, said the model shows the new case rate falling to five per 100,000 population in May, a milestone critical to bringing the pandemic under control. Council advocates for the mask mandate expressed hope this extension, through April 30, would be the last.Read more on NewsOK.com