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A healthy adult who has not had prior problems with flu vaccinations, such as allergic reactions or Guillain-Barre Syndrome, should be free of any mild side effects within a few days of the immunization. Most of those effects are typically local at the site of injection although some people can have mild systemic effects such as mild fever, aches and fatigue. Try to plan ahead, if possible, so that the trip will not start until 3 or so days after the vaccination to be most assured that you will be feeling your best during the cruise.

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13y ago

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