International requirements for vaccination.
D002648:Child; D002771:Cholera / Q000517:prevention & control*; D004641:Emigration and Immigration; D005260:Female; D006801:Humans; D011247:Pregnancy; D012899:Smallpox / Q000517:prevention & control*; D014481:United States; D014611:Vaccination; D015004:Yellow Fever / Q000517:prevention & control*