The news came just as the patient with the Bailiwick's one and only case in some 130 days recovered, and the new case was confirmed by director of public health Dr Nicola Brink.
She said the case was identified on a day seven swab from a person who had travelled to the island from the UK.
This patient had returned to the island, having complied with travel advice, and went straight into compulsory isolation.
Covid-19 was picked up when they were tested on the seventh day after their arrival.
Dr Brink said the patient was doing well and has complied with mandatory self-isolation requirements.
‘The identification of this second case further demonstrates that our border controls, testing regimes and track and trace protocols are working,' said Dr Brink.
'Again, it is important that the community are reassured that we have robust systems in place to identify and manage cases of COVID-19.'