According to the WHO, there are more than 2.4 million cases of infection and over 143,000 deaths in these regions.
"Our region became the epicentre of Covid-19 pandemic. It's not the time for the countries to lift the restrictions", said Carissa Ethienne, the Orgnization's leader in the region.
The WHO is the most concerned about situation in Brazil, Peru, Chile, El Salvador, Guatemala and Nicaragua.
In January and February, the Organization considered China the epicentre of the disease. In March, it was Europe, and the WHO experts believed there was a threat for the U.S. and Africa.
Earlier, Ukraine's Healthcare Ministry reported that as of 09:00 a.m., May 27, 21,905 laboratory-confirmed Covid-19 cases were observed in this country. 658 cases proved lethal, while 7,995 people recovered. 321 new cases of coronavirus were spotted on May 26.