Can we hope to vaccinate the world by next year?
The G7 leaders have pledged to donate a billion doses of coronavirus vaccine to poorer countries by the end of 2022. This barely makes a dent in whats required. As the World Health Organisation (WHO) has pointed out, it would take 11 billion doses to provide 70 per cent of the worlds population  that is, everyone aged 18 and over  with two each. If countries start vaccinating children as well, even more vaccines will be needed. About 2.3 billion globally, 1.5 billion of them in only five countries  China, America, UK, India and Brazil. Lower-income countries have administered only 8.3 doses per 100 people,