Greek health authorities announced 662 new COVID-19 cases in the 24 hours, ending at 3 p.m. Sunday, along with 23 deaths.
The number of patients on ventilators continued to rise, to 301 this time.
Earlier this month it had fallen to a low of 244.
There were a total of 19,694 tests on Sunday, with the positive ones 3.36% of the total.
Three hundred thirty-two new cases (50.2% of total) were recorded in the Attica region, followed by Achaia, in western Greece, with 59.
Since the pandemic, there have been 172,128 confirmed COVID-19 cases, with 6,126 deaths.