A New York Times investigation suggests that UN peacekeeping troops imported cholera to Haiti.
Presidential elections are on Nov. 28.
18,383 people have been sickened by cholera in Haiti (Creative Commons)
D.R. officials failed stop disease from crossing border.
(Photo courtesy United Nations)
The official death count of the epidemic reaches 800, but many more are feared dead.
Cholera has reached Haiti's vulnerable capital, worrying public health officials.
Haiti still struggling to recover from massive earthquake earlier this year.
More than 250 people are dead and another 3,000 infected as cholera breaks out in Haiti.