Nearly 3,000 inmates at two prisons in Thailand’s capital have tested positive for COVID-19, the Corrections Department said Wednesday, as the country battles a new wave of the coronavirus.

The department said 1,785 of the 3,274 inmates tested positive at Bangkok Special Prison, which holds detainees ahead of trial. At the Central Women’s Correctional Institution, 1,040 of the 4,475 inmates were infected, it said.

The Corrections Department announced the infections after a prominent political activist released on bail last week announced Wednesday that she had tested positive for the virus. Panusaya “Rung” Sitthijirawattanakul and fellow members of a student-led pro-democracy movement are awaiting trial on charges of defaming the monarchy, or lese majeste, which is punishable by up to 15 years' imprisonment.

In this photo released by Department of Corrections, an empty room is seen at COVID-19 prisoners field hospital set up at Medical Correctional Institution to treat COVID-19 inmates, in Bangkok, Thailand, on May 8, 2021. Almost 3,000 inmates incarcerated at two prisons in Thailand’s capital Bangkok have tested positive for COVID-19, the Corrections Department said Wednesday, May 12, 2021 as the Southeast Asian nation battles a virulent third wave of the coronavirus. (Department of Corrections, Thailand via AP)

In this photo released by Department of Corrections, an empty room is seen at COVID-19 prisoners field hospital set up at Medical Correctional Institution to treat COVID-19 inmates, in Bangkok, Thailand, on May 8, 2021. Almost 3,000 inmates incarcerated at two prisons in Thailand’s capital Bangkok have tested positive for COVID-19, the Corrections Department said Wednesday, May 12, 2021 as the Southeast Asian nation battles a virulent third wave of the coronavirus. (Department of Corrections, Thailand via AP)

The department confirmed last week that two other activists also tested positive for COVID-19. The legal aid group Thai Lawyers for Human Rights said nine activists who were detained have tested positive, including Panusaya and another who has been released.

Health authorities on Wednesday announced 1,983 new coronavirus cases, bringing Thailand's confirmed total to 88,907 since the pandemic began. There were 34 new deaths, for a total of 486.

The new coronavirus wave began at the beginning of April, originating in upmarket entertainment venues in Bangkok and spawning clusters in several crowded slum communities, followed by other venues such as department stores. Many recent cases involve the British variant of the virus, which is more infectious than the original form found last year.

In this photo released by Department of Corrections, COVID-19 prisoners sit inside a field hospital set up at Medical Correctional Institution to treat COVID-19 inmates, in Bangkok, Thailand, on May 8, 2021. Almost 3,000 inmates incarcerated at two prisons in Thailand’s capital Bangkok have tested positive for COVID-19, the Corrections Department said Wednesday, May 12, 2021 as the Southeast Asian nation battles a virulent third wave of the coronavirus. (Department of Corrections, Thailand via AP)

In this photo released by Department of Corrections, COVID-19 prisoners sit inside a field hospital set up at Medical Correctional Institution to treat COVID-19 inmates, in Bangkok, Thailand, on May 8, 2021. Almost 3,000 inmates incarcerated at two prisons in Thailand’s capital Bangkok have tested positive for COVID-19, the Corrections Department said Wednesday, May 12, 2021 as the Southeast Asian nation battles a virulent third wave of the coronavirus. (Department of Corrections, Thailand via AP)

The new wave accounts for about two-thirds of all confirmed Thai cases and more then three-fourths of the deaths.

Anti-coronavirus restrictions have been tightened, although there are no strict curfews or travel bans. In the worst-hit areas, such as Bangkok, restaurants are barred from dine-in service and can only sell take-out meals.

The surge in cases and deaths has strained the capacity of hospitals to provide beds and ICU facilities, leading to the establishment of temporary field hospitals.

Buddhist monks wear face masks to help protect themselves from the coronavirus as they pray at the Traimit Temple in Bangkok, Thailand, in Bangkok, Thailand, Tuesday, May 11, 2021. Buddhist monks in Thailand held a national prayer event to boost the nation's morale as the country struggles to curb a new surge of COVID-19. (AP PhotoThanachote Thanawikran)

Buddhist monks wear face masks to help protect themselves from the coronavirus as they pray at the Traimit Temple in Bangkok, Thailand, in Bangkok, Thailand, Tuesday, May 11, 2021. Buddhist monks in Thailand held a national prayer event to boost the nation's morale as the country struggles to curb a new surge of COVID-19. (AP PhotoThanachote Thanawikran)

There is concern over the slow pace of vaccinations after Prime Minister Prayuth Chan-ocha’s government failed to secure adequate vaccines. Less than 3% of the country’s population has been vaccinated.

Even with limited supplies, demand for vaccinations through an online scheduling app has fallen short of targets in some areas, said health officials, who announced plans to make it easier to get inoculated.

While it will still be possible to book online, people will also be able register via groups to which they belong, such as their workplaces, as well as go to several mobile walk-in centers without reservations, Public Health Minister Anutin Charnvirakul announced. The expanded system will come into effect in June, when local production of the AstraZeneca vaccine is to begin at a planned rate of 10 million doses monthly.