I'm sorry for your troubles Larry. I have no personal experience with immunotherapy, other than
Erbitux as a targeted therapy, but two drugs are being talked about as being most significant for the past 15 years are Keytruda (Pembrolizumab) and Opdivo (Nivolumab). There are also other types of immunotherapies.
There is a big ASCO Symposium in Chicago that started today, so maybe newer reports will be coming forward in the next few days.