The Pfizer/BioNTech was available first so there is more data, but the Oxford/AstraZeneca was mostly used in the older age group. Both vaccines are being given as single doses until up to 12 weeks. The study was not set up to look at any differences between the two. During this period, 1.14m vaccine doses were administered and 21% of the Scottish population received a first dose. The data was gathered between Dec. 8 and Feb. 15, a period when 21% of Scotlands population received their first vaccine shot.
Pfizer is just one of four vaccines.
( z0 vaccine :quant 1 :ARG1-of ( z1 include :ARG2 ( z2 vaccine :quant 4 ) ) :domain ( z3 company :name ( z4 name :op "Pfizer" ) ) :mod ( z5 just ) )
(z0 / vaccine
    :quant 1
    :ARG1-of (z1 / include-91
                 :ARG2 (z2 / vaccine
                           :quant 4))
    :domain (z3 / company
                :name (z4 / name
                          :op1 "Pfizer"))
    :mod (z5 / just))
Pfizer is just one of four vaccines .
z3 :name z4
z4 :op1 2
z0 :ARG1-of z1
z0 :quant 0
z0 :mod z5
z0 :domain z3
z2 :quant 1
z1 :ARG2 z2