The health body recently changed the way it records the figures.
Cases identified through a positive lateral flow test – those which can deliver results within half an hour – will no longer be counted if the person then takes a PCR test, which is sent to a lab to be checked, and receives a negative result within three days.
These cases are now being removed daily.
The rate of infection in West Sussex now stands at 4,974 cases per 100,000 people, far lower than the England average of 7,126.
Across the UK, the number of recorded cases increased by 10,809 over the period, to 4,600,623.
West Sussex’s cases were among the 554,926 recorded across the South East, a figure which rose by 892 over the period.
Cumulative case counts include patients who are currently unwell, have recovered and those that have died.