The combination of Delta and Omicron variants is driving a dangerous tsunami of COVID-19 cases, the World Health Organization (WHO) chief has said, writes BBC.

Tedros Adhanom Ghebreyesus’ words came as the US and countries across Europe reported record new cases.

France reported Europe’s highest ever daily figure for the second day in a row, at 208,000 cases.

And the US has reported a record average of 265,427 cases a day over the last week, according to Johns Hopkins.

Denmark, Portugal, the UK and Australia have all also reported record-breaking figures.

Poland reported 794 COVID-related deaths on Wednesday, the highest number in its fourth wave of the pandemic. More than three-quarters of these were unvaccinated people.