There is a "shocking imbalance" in the distribution of Covid-19 vaccines worldwide and most countries do not have anywhere near enough shots to cover health workers and others at high-risk, World Health Organisation (WHO) director-general Tedros Adhanom Ghebreyesus said on Friday.

More than 700 million jabs have been administered worldwide against the disease, but 87 percent have gone to high income or upper middle-income countries, with low income countries receiving just 0.2 percent, he said.

"On average in high-income countries, almost one in four people has received a Covid-19 vaccine. In low-income countries, it’s one in more than 500...