A study finds that an mRNA vaccine is highly effective at preventing recurrence of this dangerous skin cancer, when used in combination with Keytruda, an immunotherapy drug. Connie Franciosi, 80, noticed a suspicious spot on her skin and was diagnosed with melanoma in 2020. "It was considered a late diagnosis," she says. The skin cancer can be difficult to treat if it's not detected and treated early, and it can spread t... [5442 chars]