The country registered 2,607 new Covid cases admitted to hospital during the previous 24 hours, but government data showed an average of more than 20,000 positive antigen tests over the past week.
On Wednesday morning, the government announced 19 coronavirus-related fatalities and 2,886 hospital admissions.
All 2,607 new patients were infected inside Thailand - 15 prison inmates and the rest in the general population.
At present the health ministry is counting only those patients admitted to hospital in the daily caseload. But over the past seven days, antigen tests showed a daily average of 20,547 people tested positive for Covid-19.
As of midnight Wednesday, a total of 23,445 people were receiving Covid-19 treatment (up from 23,179 the previous day), including 11,547 in hospitals (up from 11,271). Among the remainder, 854 were in field hospitals/hospitel facilities (up from 839) and 11,196 in home/community isolation (up from 11,042).
Of those in hospital, 854 were seriously ill patients with lung inflammation (up from 851) and 382 needing ventilators (down from 394).
