Landscape painter Sharon Richardson survived polio, a viral illness that damages or destroys the nerves essential for moving muscles. With no vaccines available, epidemics occurred unchecked. Also known as infantile paralysis, polio left youngsters crippled and dependent on leg braces, crutches, wheelchairs, and in some cases, iron lungs to breathe for them. Richardson was diagnosed with polio at the age of eight weeks in 1946. In a borrowed car,...