you see news articles about norovirus all the time in the context of cruise ships because these are enclosed spaces with stable populations who infect and re-in

you see news articles about norovirus all the time in the context of cruise ships because these are enclosed spaces with stable populations who infect and re-infect each other through fecal contamination and aerosolized vomitus. full decontamination (to stop the spread) without clearing everyone off the ship is very difficult. imagine a house with small children (who are not good at personal hygiene) as a tiny cruise ship which you can never fully disembark, and then when the cooking/cleaning staff (parents) get sick, things get really ugly. it's generally easier to clean the hard surfaces in your house (with harsh stuff like bleach wipes) than to clean the soft surfaces. that's presumably why she focuses on the laundry infection vector.