Fig. 1
From: Cross-border movement, economic development and malaria elimination in the Kingdom of Saudi Arabia
Neighboring regions/governorates along the border (red line) between Saudi Arabia and Yemen showing the desert areas (hatched areas) of Al Nafud and Rub Al Khali (the empty quarter); Insert showing margins of transmission in Jazan and Aseer regions, Saudi Arabia and Hajjar and Sadah governorates in Yemen: because of altitude greater than 2000 m (dark green) and deserts (light green)