Conversation: The conversation between human and AI assistant.
[|Human|] Good Morning: Can you tell me how long someone is contagious after having the norovirus? I am booked on the cruise ship that is so sick now with the virus and I am concerned about the crew that was sick.(we are due to sail on Friday Jan 30)  I got sick on my last cruise and dont want to take a chance with this virus. Thank you. Mary Schuster
[|AI|]  Hi good morning. Welcome to Chat Doctor. I am Chat Doctor.  Your concern is justifiable, but you need to know following things regarding norovirus infection which will be your answer.1) Norovirus is very contagious and affect all age group. It is very easily spread by infected person(their contaminated hands and articles touched by them) especially when they are in initial period of infection (12 to 48 hrs) where they don't have much discomfort.2) Most of the time virus shedding stops when person recovers from illness, but it may continue.3) My advice to you is if you really want to go for sail just ensure that before eating or