Thailand's Ministry of Public Health announced mandatory yellow fever certificates for travelers from 12 African countries effective June 10, 2026. Affected nations include Nigeria, Ghana, Kenya and the Democratic Republic of Congo. Certificates must be issued at least 10 days before arrival.
The requirement applies to all travelers regardless of nationality or transit history. Children under one year and pregnant women receive medical exemptions with documentation. Thailand recorded zero yellow fever cases in 2025 but aims to prevent imported outbreaks.
Airports in Bangkok, Phuket and Chiang Mai have added vaccination verification desks. Passengers without valid certificates may be quarantined for six days at their own expense. Airlines have been instructed to check documents during check-in.
The WHO lists 42 countries with yellow fever transmission risk. Thailand previously required proof only from direct endemic-zone travelers. The expanded rule aligns with updated International Health Regulations.
Vaccination remains valid for life after a single dose. Travelers should carry both the original certificate and a digital copy. Thai embassies in affected countries have increased appointment slots for verification letters.
Health officials project the measure will affect 120,000 annual arrivals. No additional fees apply at Thai borders. The policy will be reviewed after the 2026 rainy season when mosquito activity peaks.