I understand the chain of thought of catching viruses from Walmart, planes etc. The difference here was that Sea Princess had advanced knowledge of the situation and chose not to notify upcoming passengers. I feel that they had a moral obligation to do at least that, so that passengers could make an informed decision as to whether to postphone,cancel or continue as planned. Would you like to spend half of your trip sick in bed, missing events, ports, etc. I was on another cruise that had norovirus come up a few days into the cruise, they encouraged everyone to visit the doctor assuring them that there would be no charge and they used superior sanitation methods. The outbreak was quickly under control.