Travel info

Hi folks, hope someone here can offer some insight, as something I never anticipated has come up. A homeschool group is putting together a trip on an ocean cruiser to the Caribbean. The rates are really reduced and it seems like a great opportunity, but since I have refused to vaccinate my daughter after the horrible near death reaction she had as a baby, I'm afraid we won't be allowed on the trip.
Can anyone direct me to where I can seek help on this?
Thanks a million in advance.
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