Malaria
Areas with malaria: Rural areas only, except none in the Red River Delta. Rare cases in the Mekong Delta. None in Da Nang, Haiphong, Hanoi, Ho Chi Minh City (Saigon), Nha Trang, and Qui Nhon.
Estimated relative risk of malaria for US travelers: Low.
Drug resistance4: Chloroquine and mefloquine.
Malaria species: P. falciparum 50%–90%, remainder P. vivax.
Recommended chemoprophylaxis:

Southern part of the country in the provinces of Dac Lac, Gia Lai, Khanh Hoa, Kon Tum, Lam Dong, Ninh Thuan, Song Be, Tay Ninh: Atovaquone-proguanil or doxycycline.
Other areas with malaria except Mekong Delta: Atovaquone-proguanil, doxycycline, or mefloquine.
Mekong Delta: Mosquito avoidance only.