It also announced 21 new coronavirus cases in the past 24 hours, raising the total in the country to 2,612.
Of those being treated in Greek hospitals following infection with Covid-19, 36 are in critical condition, it said.
The average age of those in Intensive Care Units (ICU) is 67 years.
A total 75 people have left ICU.
Authorities have so far carried out a total of 77,251 tests.
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