Scarlet fever
The hospital initially accepted fever patients from five parishes in the Liberties. A year after its foundation the catchment area was extended to the district south of the River Liffey as far as the South Circular Road. By 1810 this was extended to the whole of the city of Dublin, and to all classes of applicants, which increased the financial pressure on the hospital. In the year 1812 over 2,200 patients were admitted. The hospital did succeed in checking the spread of disease, but the worsening unemployment in the Liberties following the Act of Union and occasional epidemics, such as Scarlet fever, pushed up the mortality rate for the first few years of its existence. However, by 1815 the mortality rate in the hospital had declined to 1 in 20 (from 1 in 11 in 1804).