It applies to those travelling from Europe and Eurasia (even via the UK), including the Republic of Ireland, but not those travelling to Jersey directly from the UK.
Travel update: Travellers arriving in Jersey from Europe and Eurasia are advised to self-isolate for 14 days. For accurate updates and information: https://t.co/LykdpDt4Q7pic.twitter.com/lumimqzqcV
— Government of Jersey (@GovJersey) March 17, 2020
It also applies whether travellers are displaying flu-like symptoms or not.
If anyone develops flu-like symptoms during this isolation period, they are urged to call the corona virus helpline.
Essential workers do not have to follow this advice, as officials said their presence is important for the island’s running and that they should not affect the ‘containment strategy’ currently in place.
“We have not taken this decision lightly, but to protect our community we feel it is right and proper to put this measure in place,” Chief Minister Senator John Le Fondré said.
“Mainland Europe is now the epicentre of the corona virus and ensuring that anyone coming to Jersey from Europe and Eurasia self-isolates for 14 days is a prudent approach.”

Pictured: Chief Minister Senator John Le Fondré described the measure to make travellers self-isolate as “prudent”.
Islanders are still being reminded not to travel unless it is absolutely essential, such as for medical care, to provide care for others or essential business that cannot be carried out remotely.

Pictured: the affected countries for the new travel measures, as listed by the Government of Jersey.
Medical Director Dr Patrick Armstrong, Director General for Health Caroline Landon and Chief Nurse Rose Naylor elaborated on the government’s bid to ‘flatten the curve’ of covid-19 cases in Jersey during a press briefing yesterday.
Ms Landon also explained that all five people with covid-19 on the island had recently been in affected countries, and had not caught the illness locally.