By Phil Galewitz – Worried about the high cost of the copayment for the shingles vaccine, Jacky Felder, a Medicare beneficiary, opted against getting immunized last year. Last month, the Green Bay, Wisconsin, woman developed the disease, which left a painful, itchy rash across her abdomen. “Luckily, I’ve had a relatively mild case, but it’s been a week and half with a lot of pain,” said Felder, 69.