Six healthcare workers in one government department have tested positive for coronavirus.
The government says they all work in a care setting, helping independent living facilities in the community.
Their direct contacts are now self-isolating and will be tested.
"To protect the identities of the patients they support and to respect their privacy, we are unable to provide more detail.
"As announced at this morning’s press conference, some 60% of the Island’s workforce, including healthcare workers, are being asked to join an enhanced testing programme to protect themselves and others.
"They will undergo regular PCR swab testing, at frequencies based on the risk of infection and onward transmission, to ensure we proactively seek out the virus and prevent COVID-19 clusters.
"This will protect the health of Islanders and keep both our essential services and the Island’s economy running."

Plans to charge wealthiest patients for medical travel
Railway Walk reopens 'several weeks' ahead of schedule
New bar opening at former Rojo and X site to evolve Jersey's nightlife
Former Chief Minister seeks re-election
Château Vermont to become home to new music campus
St Saviour break and entry suspect pictured posing on motorbike
'Overstretched' neurology department following under-experienced managers
Channel Islanders asked to report injured or dead seabirds