AUSTIN, Texas - Two Texas residents who were monitored for possible hantavirus exposure after traveling aboard an Antarctic cruise ship have completed their observation period without developing symptoms, Texas health officials said Saturday.

What we know: The Texas Department of State Health Services said the passengers reached 42 days since their last possible exposure to the Andes strain of hantavirus, the longest known period between exposure and the onset of symptoms.

The agency said neither person showed signs of infection and no longer faces any public health recommendations related to the exposure.