Regarding cancer treatment, wonder how much more advancement did they get on that polio treatment. Where lot of test subjects with a brain tumor was treated b

Regarding cancer treatment, wonder how much more advancement did they get on that polio treatment. Where lot of test subjects with a brain tumor was treated by injecting polio virus into them. https://www.uhhospitals.org/blog/articles/2020/01/clinical-trial-studies-treating-brain-tumor-with-genetically-modified-poliovirus https://www.uhhospitals.org/blog/articles/2020/01/clinical-t...