This guideline is available in English and contains 9 chapters in addition to lists of tables and geographic maps. The Yellow Book is published every two years by CDC as a reference for those who advise international travelers of health risks. It is for intended primarily for health care providers. Topics covered include: travelers' health; responsibilities of clinicians, travelers, and the travel industry; pre- and post-travel general health recommendations; geographic distribution of potential health hazards to travelers; prevention of specific infectious diseases; yellow fever vaccine requirements and information on malaria risk and prophylaxis, by country; non-infectious risks during travel; conveyance and transportation issues; international travel with infants and young children; and advising travelers with specific needs.