Hantavirus live updates: 41 people under monitoring across US

The French government has been tracking 26 people who had close contacts with cruise ship passengers, and all of those people tested negative for hantavirus on Thursday, according to French Health Minister Stephanie Rist.

“As a precautionary measure against a disease whose lethality is estimated at between 30 and 40% and given the long incubation period -- evaluated today at 42 days -- these 26 individuals have all been placed in hospital isolation,” Rist said. “These 26 individuals will continue to be medically monitored and tested three times per week.”

Meanwhile, the one French cruise ship passenger who tested positive for hantavirus remains in intensive care, Rist said.

-ABC News’ Will Gretsky

Three people in Kansas who have been under monitoring by the state's health department for potential hantavirus infection have been transported to a hospital for observation, a department spokesperson told ABC News.

It is not clear why they were transported and if any of the three have shown signs of symptoms.

Kansas’ health department initially announced on Tuesday that these three people -- who were not cruise ship passengers -- were exposed to an infected individual abroad. The department said their exposure was "high risk" and said at the time that they were not showing any signs of illness.

The Centers for Disease Control and Prevention is "aware and monitoring closely," a spokesperson told ABC News.

-ABC News’ Youri Benadjaoud

North Dakota’s health department said it is monitoring five individuals who were exposed to a sick hantavirus cruise ship member abroad. None of these five people were on the cruise ship, the department said.

There are now 11 state health departments monitoring a total of at least 23 people, none of whom have symptoms.

The other states monitoring people are Texas, California, Georgia, Virginia, Arizona, New Jersey, Maryland, Washington, Kansas and Minnesota.

-ABC News’ Youri Benadjaoud

Dr. Stephen Kornfeld, who identified himself as the first American who initially tested positive for hantavirus from samples taken on the cruise ship, has now tested negative in subsequent testing, he told ABC News.

The testing was originally listed as inconclusive per the World Health Organization because of a positive and negative test result returned from a Dutch lab. Health officials had proceeded with caution and labeled him as a positive case.

Kornfeld was moved from the Nebraska Biocontainment Unit to the National Quarantine Unit, alongside his fellow passengers, according to a statement from Nebraska Medicine.

-ABC News' Youri Benadjaoud and Vera Drymon