World Health Organization (WHO) "The World Health Organization (WHO) has called for a moratorium on COVID-19 vaccine boosters until at least the end of September to enable a minimum of 10% of the population of every country to be vaccinated. Making the appeal at the WHO’s COVID-19 media briefing on Wednesday, Director-General Dr Tedros Adhanom Gheybreysus said support for the moratorium from the G20 countries was vital as they are “the biggest producers, the biggest consumers and the biggest donors of COVID-19 vaccines”."