How does resistant strains of bacteria develop?

Answer:
From the over prescribing of antibiotics. Bacteria change to overcome the affects of antibiotics. They keep morphing or changing and we keep trying to find more ways to kill them. They become resistant or immune to the new medicines we come up with to kill them. In the process they become stronger. blah blah
First answer by Carouselle. Last edit by ID1635567920. Question popularity: 8 [recommend question].