Poor communication by China's economic managers has led to uncertainty and exacerbated market fears, IMF chief Christine Lagarde said Thursday at the annual Davos summit of economic and business leaders.

Nearly half of those questioned also expect an artificial intelligence machine to be sitting on a corporate board of directors within the next decade.

Dozens of makers of medicines and diagnostic tests have joined together in an unprecedented effort to tackle "superbugs" - infections that increasingly don't respond to drugs and threaten millions of people in countries rich and poor.