WHO has COVID warning for Europe before summer

"With increasing social gatherings, greater population mobility, and large festivals and sports tournaments taking place in the coming days and weeks, WHO Europe calls for caution," the WHO's European head Hans Kluge told a press briefing.

Over the last two months, new COVID-19 cases, deaths and hospitalizations have declined, prompting 36 out of 53 countries in the region to start easing restrictions.

The number of reported COVID-19 infections last week came in at 368,000, a fifth of weekly cases reported during a peak in April this year, Kluge said.

"We should all recognize the progress made across most countries in the region, we must also acknowledge that we are by no means out of danger," he added.