Nontoxic drug delivery system could lead to effective therapies for currently untreatable cancers

https://medicalxpress.com/news/2021-10-nontoxic-drug-delivery-effective-therapies.html

"bacteria-based system... a highly modified type of salmonella that is injected into the bloodstream. Salmonella are known to accumulate in tumors... not only can it easily enter cells, but it can specifically target cancer cells to deliver proteins (drugs) directly while leaving healthy cells alone. And once its protein payload is delivered, the bacteria dissipate and clear... With liver cancer, we're seeing pre-clinical evidence that it has an anti-tumor effect"