Thailand has been fighting to deal with a virus surge that began in early April in a group of nightclubs in Bangkok and has since spread around the country.

The Center for COVID-19 Situation Administration reported a record 5,485 new cases, of which 1,953 were in prisons. Confirmed deaths increased by 19 to bring the total to 1,031 since the pandemic began last year.

The total number of confirmed cases has now risen to 159,792, of which 82% occurred during the latest surge. Many of the cases are concentrated in prisons, housing for construction workers, factories, slums and low-income housing areas. Officials have in some cases been criticized for allowing companies to isolate and quarantine workers inside factories.

Bangkok, which has been a hot spot in the outbreak, reported 1,356 of the cases on Monday. CCSA deputy spokeswoman Apisamai Srirangsan said the capital currently has 45 clusters to deal with.

Bangkok will slightly ease its lockdown measures starting Tuesday. In addition to reopening parks and botanical gardens, the city will allow limited numbers of visitors to museums, science parks, historical monuments, ancient places and art centers.

Schools, bars, nightclubs and entertainment venues will remain closed, but tattoo parlors, nail salons, beauty and weight loss clinics, and some massage parlors will be allowed to reopen with restrictions on the number of clients.

Thailand had been considered a success story last year for largely containing the virus, though at great economic cost, especially to its tourism sector, because foreign visitors were largely banned from entering the country.

So far, about 3.3% of the country''s roughly 69 million people have received at least one vaccine dose. The government has secured just 7 million vaccine doses in total.

The government has been negotiating to get more supplies that would allow it to fully inoculate about 70% of the population by the end of the year. Its earlier plans would have allowed only about 45% of the population to be inoculated.