Hantavirus is scary, if it got the ability to spread via aerosols and the like, we would be in for a world of hurt. Some strains have a 40% mortality, although most are well below that they are all way more than covid.

This is the Argentinian strain it appears as that is the only one they know of that has spread person to person, and the cruise started out there. Hopefully none of the infected have a cold or flu that could recombine with hanta and create a new virus as such.