Competition ?In La prese paper this morning...
https://www.lapresse.ca/actualites/sciences/2022-07-24/hopital-general-juif/des-bacteries-contre-le-cancer.php
Sorry it's in french, but to me it look like they are using the same kind of process to send the therapy at the right spot.
Here is a link in english
https://www.cbc.ca/player/play/2046902851773