Having trouble with the website today. This is my full response which did not go through the first time...
As you point out, the issue of norovirus goes well beyond the cruise line industry. Development of a vaccine for anything that poses a significant health risk is progress in the right direction.
On the point of cruise ships, what I would be interested in is seeing everyone educated and adherent to good hand washing technique. Norovirus or the need for a vaccine would be less of an issue if people observed hygienic hand washing practices.
This is a major issue and it literally makes me physically ill (NPI) when I see people walk out of a bathroom and directly into the dining areas without washing their hands... and they also walk right past the disinfection crew. It isn't just a couple people, it is way too many. I do not understand why it is so difficult for so many people to take a couple extra minutes to wash and dry their hands after using the toilet.... really? We often avoid the cafe-style dining areas as a result of seeing too many people doing this.
I wish there was a way to video people walking from their bathroom stall, right past the sink, and into the cafeteria (without invading their privacy). Playing this back for people at the safety briefing would certainly raise awareness. Infection control is most definitely part of ship safety and requires more focused and serious attention. Right now, it's getting lip service at best.
For our upcoming trip, I am considering bringing a few pairs of disposable gloves with me so I can wear them before handling utensils on the cafe line.