https://patents.google.com/patent/CN112220919A/en?q=graphene+oxide+vaccine&oq=graphene+oxide+vaccine  CN112220919A China Download PDF Find Prior Art Similar Other languagesChineseInventorćŽć€§ç„„é«ææąèŸç°éæéȘçČæČçŠCurrent AssigneeShanghai National Engineering Research Center for Nanotechnology Co Ltd Worldwide applications 2020 CN…