While it mainly impacts people who are already sick, healthcare providers say it’s important to be aware of this fungus. A drug-resistant “superbug” fungus that can be deadly is spreading across the U.S., with a new government report showing just how widespread the problem is. Doctors stress that Candida auris isn’t really a risk to people who are otherwise healthy. These latest stats add to a growing body of research that suggests Candida auris cases are on the rise. Candida auris is a type of yeast that can cause severe illness, according to the CDC .