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.

That's according to the inaugural "Best Countries" ranking from U.S. News & World Report, the University of Pennsylvania's Wharton School and global brand consultants BAV Consulting. The ranking was officially unveiled at the World Economic Forum in Davos, Switzerland, on Wednesday.

RBI Governor Raghuram Rajan on Wednesday sought to allay fears amid the stock market plunge and the rupee nearing its lowest-ever level, saying things will stabilise and people will look at stable emerging markets, including India.