When it’s nice outside, you can probably find Margie Linn gardening on the porch of Vancouver’s Rite Choice Ventilator Speciality adult family home.She’s got a fairy garden, hydrangea, honeysuckle and clematis to tend to. If Linn isn’t gardening, she’s probably painting in the living room at the family home, which has partially been converted into her art studio.“I lose myself completely” in painting, Linn said. “It’s the like the time flies by. I don’t even know the day is gone. When you have a passion, you can just get lost in it because you enjoy the whole process, and then you’ve got a result afterward.”These are just a few examples of how Linn, who turns 79 this week, has kept her independence, despite being in a wheelchair and on a ventilator to help her breathe. Overcoming setbacks and staying independent is a theme in the Portland native’s life that began after she was diagnosed with polio at age 13 in 1953 — one year before injections of the polio vaccine were given to a group of students in Pennsylvania.When polio struck, Linn spent a week isolated, only able to visit her parents through glass. At first, Linn was naive and believed polio would be like the flu or an ordinary sickness. But instead it robbed her of the ability to walk.