The spread of deadly superbugs that evade even the most powerful antibiotics is no longer a prediction and is happening right now across the world, according to World Health Organization officials.

Antibiotic resistance has the potential to affect anyone, of any age, in any country, the WHO said in a report Wednesday. It is now a major threat to public health and "the implications will be devastating," it said.

"We have a big problem now, and all of the trends indicate the problem is going to get bigger, said Keiji Fukuda, WHO assistant director-general for health security.