Central, Eastern, and Western Africa =eginning in 2003. Polio is still endemic in Nigeria. Travelers to rural areas of West Africa may be exposed =o Lassa virus, which is spread through contact =ith rat urine or droppings. People can be exposed to Lassa virus by =nhaling tiny particles of these excreti

Central, Eastern, and Western Africa =eginning in 2003. Polio is still endemic in Nigeria. Travelers to rural areas of West Africa may be exposed =o Lassa virus, which is spread through contact =ith rat urine or droppings. People can be exposed to Lassa virus by =nhaling tiny particles of these excreti

Central, Eastern, and Western Africa =eginning in 2003. Polio is still endemic in Nigeria. Travelers to rural areas of West Africa may be exposed =o Lassa virus, which is spread through contact =ith rat urine or droppings. People can be exposed to Lassa virus by =nhaling tiny particles of these excreti