There are always uncertainties. The bodies immune system failed once for whatever reason what’s to say that it won’t fail again. My neighbor has been through the ups and downs of cancer for ten years now. Signing up for new trails at NIH and hoping that he was cured at multiple points. This spring he was planning on a stem cell transfer from his son but due to COVID ... that was put off ... recently he was having problems breathing and discovered several new areas of cancer. It would be really great to find a cure for this ... but although I believe Multikine will help I doubt that it will be a cure all ... more a step in the right direction. Unfortunately I have lost several friends to cancer (a husband and wife that we used to stop in and visit on our yearly trip to the beach, and a neighbor), and know several others that have had cancer and or currently have cancer. Best of luck to all longs.