Dr. Janet DeMille, medical officer of health for the Thunder Bay District Health Unit. (File). THUNDER BAY - There are growing calls from health experts in Southern Ontario for the provincial government to extend its stay-at-home order past the original May 20 end date to prevent a fourth wave of COVID-19, but local health officials continue to support a regional approach to reopening given decreasing cases in the district. “I would always support a regional approach,” said Dr. Janet DeMille, medical officer of health with the Thunder Bay District Health Unit. “I just think there are issues in the Toronto area that we don’t experience here. We can do better than Toronto most times. I would very much support a regional approach and have indicated that when I’ve had opportunities to provide that input.”