The disease has now spread to more than 30 percent of the districts in the country, with the highest concentration remaining in and around the capital, Lilongwe. Exacerbated by poor sanitation and rainy season floods, the outbreak quickly spread to two of the capital's densely-populated slums where there is no running water. The disease has now spread to more than 30 percent of the districts in the country, with the highest concentration remaining in and around Lilongwe.