More than 1,260 cases of scarlet fever have now been reported in the East Midlands - eight times the number of cases seen in the same period last year.
Between January and April 2013, a comparatively low 150 cases were treated.
Scarlet fever is considered to be rare in the UK nowadays, with usually only around 2,000 and 4,000 cases reported each year across the country.
However, since the start of the year, there has been a surge in the number of cases seen in the East Midlands.
Scarlet fever is an extremely contagious bacterial infection, which can be transmitted via airborne droplets or by skin-to-skin contact.
Most cases nowadays are mild and easily treatable with antibiotics.
Latest figures show a decline in the number of new cases of scarlet fever being recorded weekly in the East Midlands.
275 more cases of Scarlet Fever have been notified in the East Midlands in the first 11 weeks of 2014 compared to the same time last year.
Public health officials from Derbyshire County Council are warning parents to look out for the symptoms of scarlet fever in their children.