WHO director-general Tedros Adhanom Ghebreyesus has called on richer countries to suspend the COVID-19 Booster dose and allow poorer countries to catch up.
The Pharmaceuticals have been encouraging Booster doses saying it provides extra protection, while most of the world remains unvaccinated.
"WHO is calling for a moratorium on boosters until at least the end of September, to enable at least 10 percent of the population of every country to be vaccinated," said Ghebreyesus.
Gherbreyesus also criticized wealthier countries over an uneven distribution of vaccines and urged them to change the supply situation rapidly.
"More than 80 percent have gone to high- and upper-middle-income countries, even though they account for less than half of the world's population," he said, "we cannot accept countries that have already used most of the global supply of vaccines using even more of it, while the world's most vulnerable people remain unprotected."
"We need an urgent reversal, from the majority of vaccines going to high-income countries, to the majority going to low-income countries," he stressed.
At the end of July, Israel became one of the first countries in the world to start offering booster jabs to fully vaccinated older people, as part of a campaign to curb the spread of the Delta variant. Germany is set to start offering additional jabs to elderly and at-risk people in September, while the move is also under discussion in other countries.