Varicella is a highly contagious infection spread by respiratory secretions, including aerosol transmission, or from the vesicle fluid of the skin lesions of varicella or zoster infection. Varicella is usually a mild disease of childhood.
However, complications occur in approximately 1% of cases. It is more severe in adults and in persons of any age who are immunocompromised, in whom complications, disseminated disease and fatal illness can occur.
Varicella vaccine should be offered to unvaccinated travellers who have not had clinical disease, or where serology shows no immunity in those who can’t recall having had chickenpox.
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