Dr Mike Ryan likes to use a metaphor to make his point. Earlier this year, he compared booster jabs to handing out life jackets to those who already have one.
The WHO Executive Director has now turned to geography to illustrate his perspective. Asked by Prime Time about fatigue with public health measures, Dr Ryan said: "People feel that we climbed the mountain two or three times.
We got the vaccines, and look where we are again." But he warned that Europe is "approaching the worst days of pandemic again" and urged people to reduce social contacts and take vaccines when they are offered.