Please make sure your browser supports JavaScript and cookies and that you are not blocking them from loading. While the UK leaving Europe adds 'complexity' to the process, robust plans are in place to mitigate Brexit. The thinking behind it is different vaccines provoke different parts of the immune system  the main substances being antibodies and T cells. 'Of course, it adds complexity to the process, but there is a robust plan for alternative routes, and mitigation for those, in place. But, because they work in different ways, getting doses of different jabs could 'maximise' the immune response and give better, longer lasting protection.
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( z0 obligate :ARG2 ( z1 and :op ( z2 support :ARG0 ( z3 product :ARG0-of ( z4 browse ) :poss ( z5 you ) ) :ARG1 ( z6 cookie ) ) :op ( z7 block :ARG0 z3 :ARG1 ( z8 person :ARG0-of ( z9 hack ) ) :ARG2 ( z10 get :ARG0 z8 :ARG1 ( z11 data :poss z5 ) ) :polarity - ) ) )
(z0 / obligate-01
    :ARG2 (z1 / and
              :op1 (z2 / support-01
                       :ARG0 (z3 / product
                                 :ARG0-of (z4 / browse-01)
                                 :poss (z5 / you))
                       :ARG1 (z6 / cookie))
              :op2 (z7 / block-01
                       :ARG0 z3
                       :ARG1 (z8 / person
                                 :ARG0-of (z9 / hack-04))
                       :ARG2 (z10 / get-01
                                  :ARG0 z8
                                  :ARG1 (z11 / data
                                             :poss z5))
                       :polarity -)))
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z3 :poss z5
z3 :ARG0-of z4
z2 :ARG0 z3
z2 :ARG1 z6
z1 :op1 z2
z0 :ARG2 z1
z7 :polarity 0
z1 :op2 z7
z7 :ARG0 z3
z7 :ARG1 z8
z8 :ARG0-of z9
z10 :ARG0 z8
z7 :ARG2 z10
z10 :ARG1 z11
z11 :poss z5