Do you have any idea what measures were taken in the Club/Lab to prevent further spreading?
I was told both rooms were going to go through an extensive cleaning after they closed for the night. It sounds like it's the same cleaning routine they do between cruises. I don't know what was involved. I know our room was steam cleaned repeatedly and we sent our belongings to a special washer/dryer with hotter temps to be cleaned. The head of housekeeping/sanitation, all of the staff in the medical clinic, and the supervisor of guest relations all coordinated care/treatment for those affected.
We live very close to the Port of Los Angeles and drive by the Wonder pretty regularly on Sundays. On occasion, we will see a large crane type lift going up to one stateroom and staying up there (as opposed to going from room to room).
I have never worked with the cruise lines so I don't know this as a fact but I've always assumed that the lift was at that particular stateroom because it needed a "deeper" cleaning. Possibly someone in that room had been sick during the cruise, possibly there were plumbing repairs, etc. I'm not sure but you can tell that, at times they focus on doing more to individual rooms.
With lice, all bedding, pillows, etc. needs to be washed in hot water and floors and furniture need to be vacuumed. It is unfortunate that you had to deal with this but you did the right thing by notifying the ship so that they could clean the room well and not spread the lice to another family.