The Wellcome Trust’s Head of Vaccines, Dr Charlie Weller, said: “Months ago, we would have been delighted to see any of the first COVID-19 vaccines reported 70 percent efficacy.
“This would be hugely impactful for public health and highly effective in protecting against serious illness from COVID-19. We must not lose sight of this.
“It is remarkable that in just 11 months we have multiple vaccines with such impressive interim results.
“Producing the billions of doses needed to protect the world is our biggest challenge, so we will need a range of vaccines that work across different populations, age groups and settings.”