@songinmyheart54: Sorry to hear that. It may be worth another try as Melissa is generally very good at getting back to inquiries, although I'd advise the shorter they are the easier it is for her to respond. Perhaps something along the line as to is there benefit to lifelong Keytruda infusions/ should melanoma return what would options be kind of question.
If you're comfortable or interested, you may consider that approach and let me know if you get an answer.