An antibiotic has to make a journey: get in, survive the trip, stay in, and bind its target. Bacteria have evolved a defense at each of those four checkpoints. Follow the drug across the cell — then switch to the ward and see which of your everyday practices actually slow resistance down.
A susceptible cell
= one antibiotic molecule, trying to reach its target
Selection pressure100
Transmission risk100
A teaching model, not a prediction. The direction of every lever is real; the exact numbers are illustrative. Note that no combination reaches zero — stewardship slows resistance, it does not abolish it.
The drug's journeytap a checkpoint to see the defense