> To do this, we essentially need to develop something that will cause serious harm to the bacteria and yet not harm human cells.

The other problem is we depend on mutualistic bacteria to survive, if we kill all bacteria in our bodies we’ll die of malnutrition. And even worse sometimes the problem is those mutualistic bacteria getting out of balance, so we need to kill some while promoting an increase of others.

And those bacteria are constantly topped up from the environment, so we can live in a sterile environment our whole lives. It’s a delicate balance, we can’t just throw anti-bacterial things around without thought.