It is now recognized that, with the exception of sub-Saharan African, it is confined to high-risk groups.
These groups include men who have sex with other men, drug users who inject with needles, and sex workers and their clients, The Independent reported.
http://www.foxnews.com/story/0,2933,364345,00.html
Nostatic, please call & straighten up the WHO! Was it marijuana smokers who were at equivalent risk?