Trump officials seek three-week monitoring for hantavirus-exposed passengers

Trump administration officials have pushed a monitoring plan for 18 repatriated Americans that goes well beyond standard public-health practice, keeping them under watch for a full 42 days after exposure to Andes hantavirus aboard the MV Hondius. The passengers are staying at the Nebraska Quarantine Unit at the University of Nebraska Medical Center, and federal officials asked them to remain there through May 31, 2026, the 21-day mark of their monitoring period.

The unusual level of oversight reflects the biology of Andes virus, which can, in rare cases, spread from person to person and may not cause symptoms until after a long incubation period. The Centers for Disease Control and Prevention said the 18 passengers were flown back to the United States on May 10, 2026, after being exposed on the Dutch-flagged expedition cruise ship in the Atlantic Ocean. CDC has said the risk to the American public is extremely low.

The World Health Organization first notified the outbreak on May 2, 2026, and said by May 13 it had reached at least 11 cases and three deaths. WHO identified the virus as Andes virus and said the global risk remained low. CDC later said three additional cases were identified after the passengers disembarked, including in France, Spain and Canada.

The response in Nebraska is only part of the broader tracking effort. CDC said seven other U.S. passengers who returned earlier are being monitored at home by state and local health authorities. The agency has also issued quarantine orders for two passengers from the ship who are in Nebraska.

As of CDC’s May 19 update, no Andes virus cases had been confirmed in the United States as a result of the outbreak. Officials said the outbreak is evolving rapidly and the situation will continue to change, but the public-health approach has already become a test case for how aggressively the United States will monitor returning travelers exposed to a dangerous infection abroad. In this case, federal officials have chosen caution, using the virus’ incubation period to justify a 42-day window that is much stricter than many other exposure protocols.