A British tourist has become Indonesia’s first death from coronavirus — and officials fear she may have been already infected when she landed for a family vacation on the idyllic island of Bali, according to reports.

The unidentified 53-year-old mom died early Wednesday after first being taken to Sanglah Hospital after developing a fever Tuesday last week, authorities told 7News.

The tourist — who had a list of pre-existing health issues — was the first confirmed case of COVID-19 in Bali and the first death in Indonesia, the report said.

Authorities believe she contracted the novel coronavirus elsewhere and brought it to the island, 7News says.

The woman has already been cremated with her family’s approval, officials told 7News.

Her husband is in a hospital under observation and their four children remain in a hotel on the holiday island under quarantine, 7News said.

Authorities have traced at least 21 people “who have had contact since she arrived in Bali,” the Chair of Bali’s COVID-19 task force, Dewa Made Indra, told 7News.

“We have told them to do self-quarantine to prevent this disease from spreading,” Indra said.

“We have conducted medical checks, taken swabs and sent the sample to the laboratory.”

The husband had checked into the exclusive Four Seasons Resort Bali at Jimbaran Bay after his wife’s hospitalization. A spokesperson said guests there at that time have been alerted and staff are having their temperatures taken in an “abundance of caution.”

The tourist had arrived in Bali on February 29 and developed a fever on March 3, officials said.

“The patient had severe illnesses including diabetes, hypertension, hyperthyroid and lung disease,” Achmad Yurianto, a spokesman for the government’s virus response team, told Agence France-Presse.

The British embassy in Jakarta said it was “supporting the family of a British woman who has died in Indonesia and are in contact with local authorities,” the agency said.

Indonesia said its number of confirmed virus cases had reached 34, most of them in the capital Jakarta.

In Bali, nine people — all tourists — are under observation in hospitals awaiting test results, officials told 7News.