The US, UK, EU/EEA account for more than 206 million of the 448 million doses of vaccines administered worldwide.
More than one million new cases of the deadly virus were recorded last week across the 51 countries included in WHO's European region. This represented a nine per cent rise on the previous week.
The World Health Organisation's director-general's remarks come after the team visiting China suggested a leak from a lab was 'very unlikely'
The joint €40 million programme will involve Armenia, Azerbaijan, Belarus, Georgia, Ukraine and Moldova.
"We expect to see a larger number of people facing more severe mental health challenges in the coming months" as the toll from COVID-19 is compounded by winter, the head of WHO Europe said on Friday.
The mission is expected to start next month and continue for four-to-five weeks.
According to an email obtained by the Associated Press, the WHO's anti-coronavirus measures have not been enough to stop the spread of the virus among its staff.
The number of children sickened by measles in 2019 was the highest in 23 years, according to new data published by the World Health Organization and the US Centers for Disease Control and Prevention.