Bacteria can develop resistance to antibiotics. Explain how this may be prevented.

The overuse and misuse of antibiotics promotes antibiotic resistance. A common misconception is that antibiotics can be used to treat colds and the flu, which are actually caused by viruses. Therefore, by reducing antibiotics perscribed for flu, we can reduce the number of bacteria becoming resistant. Also by researching and discovering new antibiotics, as well as using a constantly changing variety of the ones already available, we can slow down the development of resistance. Doctors need to also ensure that courses of antibiotics are completed, as this will kill all the bacteria present and won't allow any survivors to become resistant and multiply.