As an organizer or transportation carrier, you are responsible for the people attending your events or riding your transportation. They had to announce it as soon as it was known. Only governments are allowed to escape culpability, at least for now.
Thank you for your reply. The CDC has made so much noise about how no one is in any danger unless someone is symptomatic, it makes me think that she may be because of them trying to get her off the ship to an air ambulance— if that is true. We may soon find out.
I hope she is OK.