The hands of young Williana Mathurin, who suffers from cholera, are seen as she rests on a cot at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015. REUTERS/Andres Martinez Casares 

Patients and companions are seen at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince, April 17, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. REUTERS/Andres Martinez Casares TPX IMAGES OF THE DAY

Givenchi Predelus, who suffers from cholera, rests on a cot at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken March 13, 2015. REUTERS/Andres Martinez Casares 

Patients and companions are seen at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 17, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. REUTERS/Andres Martinez Casares TPX IMAGES OF THE DAY

Venia Destin, who suffers from cholera, fans herself at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince, April 17, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. REUTERS/Andres Martinez Casares 

Jean Ronald Francois (L), whose son was admitted with cholera symptoms, looks at Doctor Ernst Joseph as he sets up a drip at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015. REUTERS/Andres Martinez Casares 

Williana Mathurin, who suffers from cholera, rests in a cot at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015. REUTERS/Andres Martinez Casares 

Patients and companions are seen at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince, April 17, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. REUTERS/Andres Martinez Casares

Jameson Valentin, who is suffering from cholera, sits on a cot at a Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince, April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015. REUTERS/Andres Martinez Casares

Two buckets filled with water mixed with different proportions of chlorine are seen at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015. REUTERS/Andres Martinez Casares 

Rinel Mathurin (R) feeds her daughter Williana who suffers from cholera, at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015. REUTERS/Andres Martinez Casares TPX IMAGES OF THE DAY

A worker sits ready to fumigate the shoes of people who enter through one of the entrances of the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince, April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. The wall reads "Cholera Treatment Center". Picture taken April 13, 2015. REUTERS/Andres Martinez Casares 

Jahbahcon Francois, who suffers from cholera, rests in the arms of his mother at the Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince, April 17, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. REUTERS/Andres Martinez Casares 

Jameson Valentin, who is suffering from cholera, sits on a cot at a Cholera Treatment Center run by the Haitian Ministry of Public Health and Population (MSPP) in collaboration with Doctors Without Borders (MSF) in Port-au-Prince April 13, 2015. Haitian officials are reporting a spike in cholera cases late last year and carrying over into the first three months of 2015 as an early start to the rainy season has public health workers worried. As of March 28, the Haitian Ministry of Health confirmed at least 11,721 cases of cholera, more than a 300 percent increase from the same period last year. Picture taken April 13, 2015 REUTERS/Andres Martinez Casares