Andes virus is the only type of hantavirus known to spread between humans.
While most hantaviruses are "dead-end" infections in humans, this specific strain has caused outbreaks where the virus passed from one person to another.
Evidence suggests the virus might also spread through droplets from coughs or sneezes during the early stages of the illness. It requires direct contact with fluids or very close droplets it is not airborne between humans.
Most documented human to human cases occur between sexual partners, household members, or people sharing a bed. I guess also sharing an office or packed train for a period of time.
Research suggests the virus may be uniquely resistant to human saliva, allowing it to pass through kissing or sharing utensils, whereas other hantaviruses are neutralized by saliva.
Unlike COVID-19, there is no evidence that people without symptoms can spread hantavirus.
15 minutes or more of cumulative exposure over a 24-hour period (e.g., three 5-minute interactions), rather than 15 continuous minutes.
So if someone who is infected and is inclose proximity for a prolonged time sneezing or coughing all over the place it can be transmitted. But it isn't as easily passed on as Covid.
I really wouldn't worry. It may all be contained or a few more small localised outbreaks.
I feel for the poor passengers, how traumatising.