So far 1,062 people have undergone the testing, and the third round will take place on Saturday and Sunday at Springfield and Les Quennevais Sports Centre.
The results will be analysed by Statistics Jersey and a report is due to be published on Tuesday 7 July.
Following the second round of antibody testing, the results of which were released earlier this month, it was estimated that around 4,500 Islanders had caught Covid-19.
Data released by Statistics Jersey, based on a cross-section of just over 1,000 people, also showed that 62% of those who tested positive had reported no symptoms.
The results from the pin-prick procedure, carried out at the end of May, gave an estimated prevalence of Covid-19 of 4.2% for 20 May. This date was given in order to allow for the fact that antibodies may not be detectable for up to a week.
The approximate number of cases showed an increase from the first round of testing in early May, when an estimate of 3,300 cases was given.
Statistics Jersey said that a change in the testing device was the likely cause of the difference.
Those involved in round one and two of the testing were drawn at random from the Jersey Land and Property Register in order to form a representative sample for the study, and the same method will be used again in round three.
Those tested are aged 16 or over and are living in private households. The prevalence rate, in which Statistics Jersey has expressed ‘95% confidence’, was then applied to the Island’s entire population, resulting in the 4,500 figure.
