mary kate macissac says there's been a lot of criticism from the outside media, and even some donors, that more hasn't been done. she's also frustrated by the slow pace, but she says people don't fully understand the realities on the ground. >> haiti was a country that was facing humanitarian crisis even before the earthquake. then you have a massive earthquake hit an urban center, the capital of a country, and it's a complexity of urban disaster that agencies have not had to deal with before. >> reporter: adding to that complexity is a rising cholera epidemic. world vision has set up cholera treatment units near various tent camps. visitors are disinfected before they enter and when they leave. according to the official numbers, more than 150,000 people have now come down with cholera, and nearly 3,500 have died. aid groups say the numbers are vastly underreported. on this morning, ten people have already been brought in for treatment, including a 5-year-old boy who is also being treated for malnutrition. >> it's a new emergency within an emergency, so it's basically heightening issu