As I understand it, they want the leukapheresis to be fresh, while the tumor may have been cryogenically frozen a substantial period ago. The vaccine would essentially constitute what the patient is fighting right at the time the leukapheresis is done.
This statement seems not to be correct. It would seem to me that the correct statement would be "The vaccine would essentially constitute what the patient is fighting right at the time the tumor was resected/b]"