Some parents in Oklahoma rushed to get their children last-minute immunizations before school starts.One key part of getting ready for back to school is being up to date on immunizations. Students in Oklahoma are required to get a number of shots for school to prevent diseases like chickenpox. Oklahoma Caring Foundation is doing mobile pop-ups, offering free vaccines for students who qualify for Medicaid, are uninsured or Native American."This is our busiest time of year," said Jenny Koetter, program coordinator. Families from across the metro came to Yukon’s Health and Wellness Fair to get their shots."The health department couldn't get us in until Monday, so this was a good resort to go to," said Keyona, Rodney’s mom.Rodney starts seventh grade this year at Kenneth Cooper Middle School and while he wasn’t nervous about the shot, he did have a game plan."I was focused on my game. I knew if I thought about it, I was going to feel it more so I didn't think about it," Rodney said.