The FEMA mobile vaccine unit giving COVID-19 vaccinations across Maine is accepting walk-up appointments while it is stationed in Windham. The site is only accepting walk-ups on Wednesday and Thursday, and only at the Windham location. "I think that's the group that is for whom convenience is the premium. These unscheduled hours is where I'm hoping to offer a service," said Dr. Nirav Shah, director of the Maine CDC during Tuesday's media...