The UK has ordered 30m doses of the Janssen jab which uses similar technology to AstraZeneca.
One source says: “Where it will be useful is it could work really well for the younger cohort - the 18 to 29 year olds. One hit and you are done - and you are off to Ibiza.”
Hopefully!

— Christopher Hope📝 (@christopherhope) April 3, 2021