The head of the World Health Organization Tedros Adhanom Ghebreyesus on Monday called for a two-month moratorium on administering booster shots of COVID-19 vaccines as a means of reducing global vaccine inequality and preventing the emergence of new coronavirus variants. Tedros said he was "disappointed" with the scope of vaccine donations worldwide and called on countries "to share what they can use for boosters with other countries, so other countries can increase their first or second vaccination coverage."