The agency developed a questionnaire to help identify possible exposures to the Andes virus, the only type of hantavirus known to spread person to person.

One passenger has tested positive for Andes virus, a rare type of hantavirus, while another is showing mild symptoms, health officials say.

In 2018-2019, the Andes virus hantavirus spread person-to-person in Argentina. Eleven people died — but it was stopped. Analysis of that outbreak shows the current one can also be…