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COVAX aims to make 2 billion doses of COVID-19 vaccine available by the end of next year, although rich countries are said to have reserved more than half of the world’s global capacity.
"It's going to get tougher. In October, November, we are going to see more mortality," Hans Kluge, Director of the WHO European office, said.
Research from the Clean Air Fund and CBI says cleaner air would leave Brits healthier and wealthier.
WHO's Europe chief said autumn and winter would pose a "tricky situation" with schools reopening, the onset of the flu season and increased mortality among older people in winter months in general.
The announcement comes after no cases were reported for four years on the continent, with the last case detected in Nigeria.
According to the UN, 483 aid workers were subject to attacks last year, an 18 per cent rise on 2018 and the highest number ever recorded.
The infection rate has sharply increased since the global number of cases hit 15 million on July 22, with US, India and Brazil accounting for nearly two-thirds of all cases.
The pandemic continues to accelerate, a data tally has shown, and many countries are being forced to step up their prevention measures.
The recent surge in US cases has led some states to tighten restrictions again.