Not mentioned in the article, but AZ is also going to run a trial using a different viral vector for the second dose, taken from the Russian sputnik vaccine. Th

Not mentioned in the article, but AZ is also going to run a trial using a different viral vector for the second dose, taken from the Russian sputnik vaccine. The latter have claimed rather impressive results which will be published soon https://www.theguardian.com/world/2020/dec/11/oxford-covid-vaccine-to-be-combined-with-sputnik-jab-for-trial https://www.theguardian.com/world/2020/dec/11/oxford-covid-v...