While many poor nations across the world struggle to access Covid-19 vaccines, richer ones are already offering booster shots to their populations.
The World Health Organization wants to see a halt on these boosters, as that gap between vaccinations in wealthy and poor countries widens.
The head of the WHO said it was unacceptable that countries that have already used most of the global supply of vaccines are using even more of it.
Senior health policy advisor to The People's Vaccine Alliance Dr Mohga Kamal-Yanni spoke to Susie Ferguson.
