The World Health Organization (WHO) has called for a suspension on booster vaccines for Covid-19 until at least the end of September.
WHO Chief Dr Tedros Adhanom Ghebreyesus said a pause would allow for at least 10% of the population in every country to be vaccinated.
A number of nations including Israel and Germany have announced plans to administer a third dose.
But Dr Tedros has warned poorer nations are falling behind.
According to the WHO, low-income countries have only been able to administer 1.5 doses for every 100 people due to a lack of supply.
Dr Tedros said that there needs to be a reversal and that the majority of vaccines should go to lower income countries.
“I understand the concern of all governments to protect their people from the Delta variant. But we cannot accept countries that have already used most of the global supply of vaccines using even more of it,” he added.
It is a strong call from the WHO, as the agency attempts to narrow the gap between high-income and low-income nations.
It had wanted 10% of people in every country to be vaccinated by next month, but that target is unlikely to be met on the current trajectory.
In Haiti and the Democratic Republic of Congo, none of the population has received two doses of the vaccine.
Indonesia, which has seen infections and deaths spike in recent months due to the Delta variant, has only fully vaccinated 7.9% of its population, according to Our World in Data.
–BBC
