Watch CNBC's full interview with Moderna CEO Stéphane Bancel on the experimental cancer vaccine

Moderna CEO Stéphane Bancel joins CNBC's 'Squawk Box' to discuss promising new data surrounding its experimental cancer vaccine in development with Merck. Bancel also outlines how the company is working with regulators for accelerated approval. "If we are able to teach the T cells of a cancer patient to recognize the mutation of that specific cancer that it could not recognize before, that's a massive medical step forward," Bancel tells CNBC.