The disease is primarily spread through contaminated seed or farm equipment, although it may also be carried short distances by the wind.

Cholera is spread primarily through contaminated water and poor sanitation.

The news has spread primarily through word of mouth; an advertising campaign begins this summer.

The site spread primarily through word of mouth, and by January 2009, had signed up 5,000 accounts.

As in the rest of Africa, the disease is spread primarily by heterosexual intercourse and has hit men and women almost equally.

The disease is spread primarily through food or water contaminated by stool from an infected person.

The disease is primarily spread by two species of psyllid insects.

In central Africa, the disease has spread primarily among heterosexuals, and slightly more women than men have it.