The World Health Organization is leading outbreak efforts, but the U.S. is no longer part of the WHO. Here's how that impacts hantavirus communications.

“The CDC is not even a player," said Lawrence Gostin, an international public health expert at Georgetown University. “I've never seen that before.”

The CDC is playing an unusually small, and quiet, role in responding to the hantavirus outbreak.

Physician-researcher Boghuma Titanji discusses transmission, quarantine, and outbreak response

No U.S. cases following cruise ship outbreak, but 41 people are being monitored

The CDC said it is currently monitoring 41 people for hantavirus, including patients from the ship and those subsequently exposed.