Medicine today is based on interventions after the diagnosis is given. What if nanorobots in the bloodstream could intervene even before the disease appears? Nanorobots called respirocytes could be used to keep a patient’s tissues safely oxygenated for up to about four hours after the patient had a heart attack; or serve as white blood cells; remove platelets or repair damaged cells. The opportunities are almost limitless. Moving it to the next level, modules that self-assemble inside the stomach could perform more-sophisticated diagnosis and treatment. The number and range of non-invasive operations could increase with such self-assemble robots.

And now I just came across an announcement about bacteriobots that can diagnose and treat cancer.

A bacteriobot research team from Chonnam National University announced on December 16 that it confirmed the propensity of bacteriobots to migrate toward tumors and their tumor targeting ability with animal testing. According to the team, bacteria and bacteriobots displayed minimal changes in normal cells, but those bacteriobots moved toward tumor cells with increasing speed, and thus cell density grew.