HANOI - Vietnam has mounted an all-out effort to save the life of its most critically ill novel coronavirus patient, a British pilot who works for Vietnam Airlines, the national carrier.

Through aggressive testing and a mass, centralized quarantine program, the Southeast Asian country has kept its tally of coronavirus cases to just 288 and has reported no deaths.

Little expense has been spared to try to save the life of the 43-year-old man, identified only as "Patient 91," who caught the coronavirus at a bar in the southern business hub of Ho Chi Minh City in mid-March, state media reported.

More than 4,000 people connected to the cluster were tested, with 18 of them found to be infected with the coronavirus.

While most have recovered, the British pilot is on life support and his condition has deteriorated significantly.

On Tuesday, the health ministry held a meeting with experts from top hospitals and decided that the only way to save the man's life was with a lung transplant.

His case has garnered national interest in Vietnam, where the government has won broad support for its campaign to contain the coronavirus.

On Thursday, state media said 10 people, including a 70-year-old military veteran, had volunteered themselves as lung donors, but had been turned down by state doctors.

"We are touched by their good intentions, but current regulations don't allow us to transplant lungs donated by most living people," a representative of the Vietnam National Coordinating Centre for Human Organ Transplantation (VNHOT) told the Tuoi Tre newspaper.

The patient has just 10 percent of his lung capacity left and has been on life support for more than 30 days, Tuoi Tre said.

Deputy health minister Nguyen Truong Son told media last month that Vietnam had imported specialist medicine from overseas to treat blood clots in the patient, but to no avail.

Vietnam has spent more than 5 billion dong ($200,000) trying to save him, the Vietnam News Agency (VNA) reported.

In March, Chinese state media said it had successfully carried out a double lung transplant on a coronavirus patient, a procedure it hailed as a significant method of treating the disease's most stricken victims.

Vietnam is hoping to capitalize on its success fighting the coronavirus by positioning itself as a safe place to do business as international manufacturers look to diversify their supply chains away from China.