World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus speaks during a press conference on December 20, 2021 at the WHO headquarters in Geneva. – The World Health Organization chief called for the world to pull together and make the difficult decisions needed to end the Covid-19 pandemic within the next year. (Photo by Fabrice COFFRINI / AFP) (Photo by FABRICE COFFRINI/AFP via Getty Images)