This is about as succinct a summary as it gets re mRNA's potential:
"To create an mRNA cancer vaccine, a patient’s tumor is biopsied to identify unique target mutations —> mRNA correlating to mutations is synthesized and injected into the patient —> the patient’s cells create the targeted protein —> the creation of foreign proteins stimulates the immune system and teaches it how to recognize the target protein —> The immune system (especially T cells) search for this target protein and destroy the cancer cells to which it’s attached."
"To create an mRNA cancer vaccine, a patient’s tumor is biopsied to identify unique target mutations —> mRNA correlating to mutations is synthesized and injected into the patient —> the patient’s cells create the targeted protein —> the creation of foreign proteins stimulates the immune system and teaches it how to recognize the target protein —> The immune system (especially T cells) search for this target protein and destroy the cancer cells to which it’s attached."