Some facts regarding this virus
Here's some facts about Hantavirus; I hope this information will ease some of your potential worries:
The Hantavirus is a virus that is transmissible to humans through rodent feces, urine, and saliva. There are 2 major groups of the Hantavirus, Old World (found primarily in Europe, Asia) and New World (found in the Americas). The Old World group of Hantavirus are not transmissible from human-to-human. They primarily attack the kidneys, and they have a much lower mortality rate.
Then there's the New World Hantavirus, which is the group of the virus that is currently breaking out. The New World Hantavirus group has 2 major strains, which are the "Sin Nombre" and the "Andes". The Sin Nombre strain is not transmissible from human-to-human, however, the Andes is, which is the strain currently breaking out. The incubation period (the period of time where the virus is in a person's body, but they are not exhibiting symptoms) for the Andes virus typically lasts 9-40 days. During this incubation period, the Hantavirus is isolated to a person's bloodstream, and it is not believed to be contagious. Only until someone is actually exhibiting symptoms, like fever, headaches, etc., does the Andes virus become contagious because that means the virus has exited the bloodstream and is replicating in systems within the body that can transmit the virus.
There are two different types of viruses, naked and enveloped. Naked viruses only have a protein encasing, whilst enveloped viruses are encased in a lipid (fat) shell. The Andes virus is encased in a Lipid shell, which is comparable to viruses like Influenza and Covid. The Andes virus, in comparison to the other 2, is considered to be very fragile. Covid and Influenza are able to survive being dried out which gives them the ability to "glide" around on tiny aerosols and survive which gives it a highly contagious characteristic. The Andes virus, on the other hand, is highly sensitive. This means that, in cases of human virus shedding, the virus can only survive in droplets. These droplets, however, are much denser than aerosols, which means they will succumb to gravity and will drop directly to the ground, whereas viruses like Covid and Influenza will drift through the air for hours searching for a host.
Due to the above facts, and many others, experts believe that this is unlikely to become a global event, like Covid, because unlike Covid, due to the physical nature of the virus, the Andes virus is not nearly as contagious as Covid was. You would need to be within close physical contact (kissing, sharing utensils, sharing a bed, etc.) with someone who is visibly ill, or is just starting to exhibit symptoms, in order to come in contact with this virus. If you look at the nature of Covid, it was as contagious as it was because it was transmissible during the incubation period and it was able to survive for hours "gliding" through the air searching for its next host.
One last thing that categorizes this virus as "low risk" is its evolutionary pattern. Specifically, the genetic markers identified on the Andes virus that was on the cruise ship show that this virus has not gained any significant mutations. This is also different from Covid considering Covid was a novel virus which required us to slowly learn its characteristics that we were unaware of while it was rapidly spreading throughout the world.
I'm not a doctor, and this is purely for educational purposes. If anyone has any information they'd like to correct, please do so.
Edit: Just as a stubborn reminder, this post is a general understanding of the current scientific consensus. My word should not be taken as absolute truth; however, I did my absolute best to summarize the science as accurately as I could in plain English. Please remember to crosscheck and verify all facts with official public-health sources to ensure there are no mistakes, and once again, please feel free to correct any mistakes I may have made.