Bacteria will evolve and those that resist antibiotics will survive. Other issues include over-prescription, failure to complete courses, and factors such as poor hygiene, all help bacteria become resistant. For immuno-suppressed patients, like those with HIV or undergoing chemotherapy, resistant bacteria can prove fatal.
Sally Davies, Dr Stuart Flanagan and others discuss what the future holds.
You can hear the broadcast by visiting the Radio 4 website.
More information about Sally Davies.