Two Texas residents monitored for potential hantavirus exposure after traveling aboard a cruise ship have successfully completed their 42-day observation period with no signs of infection.

A group of American passengers evacuated from the cruise ship at the center of a deadly hantavirus outbreak arrived in Nebraska early Monday morning, where they will now undergo medical evaluations and monitoring.

Health officials are continuing to monitor passengers linked to a deadly hantavirus outbreak connected to a luxury cruise ship, but a Houston infectious disease expert says the risk of widespread transmission in the United States remains extremely low.

An outbreak aboard a cruise ship of a rare rodent-borne illness called hantavirus has left three passengers dead and sickened others, but global health officials say the risk to the general public remains low because the germ does not easily spread between people.