Single-dose administration and the influence of the timing …

The results of this primary analysis of two doses of ChAdOx1 nCoV-19 were consistent with those seen in the interim analysis of the trials and confirm that the vaccine is efficacious, with results varying by dose interval in exploratory analyses. A 3-month dose interval might have advantages over a programme with a short dose interval for roll-out of a pandemic vaccine to protect the largest …

https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00432-3/fulltext