Let’s talk about the facts.

The people who got hantavirus on that cruise were extremely old and immunocompromised. I’ve looked into this closely, and this is not person to person spread. This is rodent exposure, infected rodents on board, and poor ventilation. That is how this virus spreads.

And I understand there is speculation about human to human spread on the ship, but that does not match what we know about hantavirus biology. I also understand there are ongoing concerns about what exactly is present on board. A friend who works as a doctor on the ship said that rodents on the ship tested positive for hantavirus, which would support a rodent source rather than transmission between people.

The only strain that has ever been shown to transmit between humans is the Andes virus, found in places like Argentina. Even then, it requires EXTREMELY close, VERY prolonged contact with someone who is actively sick. Not casual contact. Not shared air at a distance. Very close exposure.

For strains like Sin Nombre virus, which is what is typically seen elsewhere, there is no human to human transmission at all.

So no, this is not spreading person to person on that ship. The pattern fits a rodent exposure source.
And even then, the people diagnosed with hantavirus from the cruise are either deceased or being kept in isolation for precaution. There is no risk of spread from them.

If you are concerned, the practical steps are simple. Practice hygiene, wash your hands, and avoid potential contamination sources.
You will not get infected with hantavirus.

By the way, I’ve worked in Argentina and helped with hantavirus cases in high risk settings. I’ve been studying it since 1993.