Therapeutic tumor vaccines — a rising star to benefit cancer patients

Figure 1 According to resources downloaded from the open access website (https://ClinicalTrials.gov, cited April 9, 2021), clinical trials of tumor vaccines are unevenly distributed in the world, with the United States occupying the largest proportion, followed by Europe and East Asia. Overall, the number of North America far exceeds that of the rest regions in the world. There is little difference in the number of clinical trials conducted in other regions.