The World Health Organization says Africa suffered its worst week since the start of the COVID-19 pandemic, with cases of the Delta coronavirus variant surging in countries where almost no one has had access to vaccines.

In Namibia, nine senior government officials have died of COVID-19 over the last two weeks as hospitals have been overrun by new cases. Namibia now has one of the world’s highest infection rates.

Tunisia’s healthcare system is collapsing as the North African nation logs nearly 10,000 positive tests a day.