First of all, it is important to clarify that tumor vaccines work by introducing some component of the tumor into the patient’s body that stimulates the body’s immune system to kill and clear the tumor. Tumor vaccines work to treat tumors and prevent recurrence, not to prevent tumors from occurring.
So, is there a vaccine to prevent tumors from occurring? H. pylori infection is one of the major factors that promote the development of gastric cancer. Therefore, a vaccine against H. pylori is expected to be used to prevent the development of gastric cancer. Satisfactory results have been obtained in animal experiments with H. pylori vaccines. The recombinant H. pylori vaccine established by our scholars is the first H. pylori vaccine in the world to complete phase III clinical studies, and has shown good safety and efficacy in the study, with 71.8% of the vaccine recipients being able to prevent H. pylori infection. However, the H. pylori vaccine still faces a number of problems in research and is still a long way from being used in the clinic to prevent gastric cancer.
Therefore, vaccination is not yet available to prevent the development of gastric cancer.