18 people died in just a week in intensive care units
Fifty-six people have died of flu caused by a strain of influenza A known as H1N1 in Greece in the past three months, country's disease control agency said Friday.
The country's Center for Disease Control and Prevention said the number of flu cases has significantly risen in the last days.
The agency said in just a week, 18 people died in intensive care.
It also urged people to get vaccinated.