Three million foreigners living in Thailand have as much right to Covid-19 vaccinations as Thais because the goal is to achieve herd immunity, the government said.

Some expats have complained on social media about a lack of public information, problems registering for vaccinations and the lack of private vaccines.

"Anyone living in Thailand, be they Thai or foreign, will be able to get the vaccine if they want it," Opas Kankawinpong, head of the disease control department, said on Thursday. "No one is safe until everyone is safe."

Thailand's population is estimated at 70 million, of whom about three million are foreigners living here long-term, said Dr Opas.

"To protect this country against the novel coronavirus, we need to immunise at least 70% of the total people living here," he added.

"Foreigners who want vaccinations can also contact their own embassy to get one," he said.

Dr Opas said the process for foreigners to register their interest would be the same as for Thais -- those in vulnerable and risky groups, such as healthcare staff, those living in at-risk areas, the elderly and those with underlying diseases, would be vaccinated first.

Regarding Mor Prom, the medical application, and Line Official account platforms, the system did not allow foreigners to register for a jab at present, though the Public Health Ministry was working on it and aimed to have the change made by June.