It's the medical risk some experts say should be ranked along with terrorism on a list of threats to the nation.
Our growing resistance to antibiotics could mean a simple cut to your finger could leave you fighting for your life and childbirth could become deadly for women.
Scientists say not enough money is going into research to find new antibiotics.
The issues is being debated at a conference in Holborn today.
Dr Jenny Rohn is is one of the panel of experts and explains more.