BRANCH COUNTY — Health Officer Rebecca Burns, of the Branch-Hillsdale-St. Joseph Community Health Agency, called Thursday’s mass vaccination of 450 at the Dearth Center in Coldwater a success.Volunteer Coordinator John Petzko sent out an email thanking the volunteers who worked the day-long event with National Guard and agency staff for their help. He said "without them, this would not be possible.""I originally signed up when I saw it in the newspaper they were taking volunteers. I