The head of the World Health Organization on Sunday called for global solidarity in the rollout of any future coronavirus vaccine and warned against "vaccine nationalism". In a video address at the opening of the three-day World Health Summit in Berlin, Tedros Adhanom Ghebreyesus said the only way to recover from the pandemic was together and by making sure poorer countries had fair access to a vaccine. Acknowledging that countries want to protect their own citizens first, the WHO chief warned that "vaccine nationalism will prolong the pandemic, not shorten it".