@FoodieKenobi Because a great many people have fears heightened by Covid. There is a significant lack of understanding of relative versus absolute risk. And, of course, the disease itself.

https://secure.apha.org/imis/ItemDetail?iProductCode=978-07553-3230&CATEGORY=BK Page 245....

See also the ECDC risk assessment.
https://www.ecdc.europa.eu/en/news-events/cruise-ship-hantavirus-outbreak-ecdc-response-activated