Doctors from the UN mission's Brazilian field hospital confirmed on Tuesday that they have seen a significant rise in Malaria cases across Haiti since last month's earthquake.
Thousands of people are currently living in tent cities amid hot and steamy conditions.
And with the rainy season looming, the situation could get worse before it gets better.
'The rainy season comes in March. It has already started,' said government health minister Dr. Roc Maglorie. 'It is a government concern because people are living in shelters and many of them are too close to the vector of malaria.'
Scattered showers are forecast in Port-au-Prince right through the weekend.