All participants will receive one dose of the vaccine, with half set to receive a booster dose at a later point in time. The gloomy modelling by Imperial College London predicted 305 extra Covid deaths per million people by 2023, the equivalent of 20,130 people in the UK. Live attenuated vaccines  such as the MMR jab  work by stimulating the immune system in the same way that real disease would, but by relying on viruses unable to cause severe illness. So far, uptake in Britain has been far higher than expected, with more than 90 per cent of Britons over the age of 60 having accepted their jab. 'That is not necessarily the best way to provide protection against a respiratory virus infection, where we want the immune system to be active in the upper respiratory tract and then in the lower respiratory tract, which is where the virus is causing the infection.
Viruses cannot cause a Respiratory tract infection.
( z0 possible :ARG1 ( z1 cause :ARG0 ( z2 disease :name ( z3 name :op "influenza" ) ) :ARG1 ( z4 infect :ARG0 z2 :ARG2 ( z5 tract :mod ( z6 respire ) ) ) ) :polarity - )
(z0 / possible-01
    :ARG1 (z1 / cause-01
              :ARG0 (z2 / disease
                        :name (z3 / name
                                  :op1 "influenza"))
              :ARG1 (z4 / infect-01
                        :ARG0 z2
                        :ARG2 (z5 / tract
                                  :mod (z6 / respire-01))))
    :polarity -)
Viruses cannot cause a Respiratory tract infection .
z2 :name z3
z3 :op1 1
z0 :polarity 0
z0 :ARG1 z1
z1 :ARG0 z2
z5 :mod z6
z4 :ARG2 z5
z1 :ARG1 z4
z4 :ARG0 z2