There are now 86 confirmed cases of coronavirus in Northamptonshire according to the latest figures from Public Health England.
The number of Covid-19 cases in the county have nearly tripled since Monday (March 23) when there were 29 cases.
That is an increase of 57 cases in four days.
Eight appliances at scene of Cransley fire
Who's been sentenced from Corby, Ecton, Higham Ferrers and Kettering
Sobbing knifeman Trevor Brett who brandished blade in Kettering street sent to jail
Remembering the drought of 1976 across Northamptonshire in pictures from the archive
Kettering town centre restaurant ready to reopen with new menu and 'surprises'
It is also the single biggest increase in one day, up 22 cases from yesterday's figure of 64 cases, which had been a record jump of 21.
Only severely ill people requiring hospitalisation are being tested at the moment, so the number of coronavirus cases in Northamptonshire could be much higher.
The UK was put into 'lockdown' measures on Monday evening following an announcement by Prime Minister Boris Johnson. People are now only allowed to leave their homes for essential work, essential supplies, one exercise a day and medical or care needs.
The measures are designed to slow down the spread of the virus and reduce the number of new cases requiring medical attention, in an attempt to prevent overwhelming the NHS.
Northamptonshire had its first confirmed case of coronavirus on March 3.