That was the theory and how it works in a petri dish, however that’s not how it works in the body.

Antibiotic treatment doesn’t have to kill all of the bacteria. It needs to kill enough so the immune system can catch up and finish the job.

There been evidence for more than 50 years that overly long antibiotic treatments cause resistance to build up faster. That’s why they have limits on the first place.

So there’s a balance between too few days, and to many.