Can a cat die from biting a rat with hantavirus?
Not that I’m aware of. HV is passed to humans when they inhale dust contaminated with urine from an infected rodent. It’s primarily a disease of the rodents. Has done a pretty good job of wiping out prairie dog colonies.
It may have been much more virulent in the past and even transmissible between humans in some way, as it may have played a major role in the Great Die-off of native Americans during the 1500s.