A superbug resistant to all known antibiotics that can cause “severe” infections or even death is spreading undetected through hospital wards across the world, scientists in Australia warned on Monday. Researchers at the University of Melbourne discovered three variants of the multidrug-resistant bug in samples from 10 countries, including strains in Europe that cannot be reliably tamed by any drug currently on the market. The researchers said they believe the superbug is spreading rapidly due to the particularly high use of antibiotics in ICUs, where patients are sickest and strong drugs are prescribed as routine.

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