The Oxford vaccine is 100% effective in preventing severe illness or death. I initially felt this was really positive as it’s only 70% effective in stopping people contracting Covid-19. However in the control group there were only two people who had a severe Covid related illness, and out of the two one person died.
So it wasn’t the vaccine that prevented the deaths in those who still contracted Covid it was the demographic of the group. Healthy people or those with a stable medical condition, with the vast majority under the age of 55.