Book excerpt: The definitive reference for travel medicine, updated for 2020 "A beloved travel must-have for the intrepid wanderer." -Publishers Weekly "A truly excellent and comprehensive resource." -Journal of Hospital Infection The CDC Yellow Book offers everything travelers and healthcare providers need to know for safe and healthy travel abroad. This 2020 edition includes: � Country-specific risk guidelines for yellow fever and malaria, including expert recommendations and 26 detailed, country-level maps � Detailed maps showing distribution of travel-related illnesses, including dengue, Japanese encephalitis, meningococcal meningitis, and schistosomiasis � Guidelines for self-treating common travel conditions, including altitude illness, jet lag, motion sickness, and travelers' diarrhea � Expert guidance on food and drink precautions to avoid illness, plus water-disinfection techniques for travel to remote destinations � Specialized guidelines for non-leisure travelers, study abroad, work-related travel, and travel to mass gatherings � Advice on medical tourism, complementary and integrative health approaches, and counterfeit drugs � Updated guidance for pre-travel consultations � Advice for obtaining healthcare abroad, including guidance on different types of travel insurance � Health insights around 15 popular tourist destinations and itineraries � Recommendations for traveling with infants and children � Advising travelers with specific needs, including those with chronic medical conditions or weakened immune systems, health care workers, humanitarian aid workers, long-term travelers and expatriates, and last-minute travelers � Considerations for newly arrived adoptees, immigrants, and refugees Long the most trusted book of its kind, the CDC Yellow Book is an essential resource in an ever-changing field -- and an ever-changing world.