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. All participants will receive one dose of the vaccine, with half set to receive a booster dose at a later point in time. '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. 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. It's thought that nasal sprays may better target immune cells in the lungs, throat and nose, making them even more effective at defending against Covid.
It's thought that nasal servives attacks the Howe's vaccine.
( z0 think :ARG1 ( z1 attack :ARG0 ( z2 product :ARG0-of ( z3 service ) :location ( z4 nose ) ) :ARG1 ( z5 vaccine :name ( z6 name :op "Howe" ) ) ) )
(z0 / think-01
    :ARG1 (z1 / attack-01
              :ARG0 (z2 / product
                        :ARG0-of (z3 / service-05)
                        :location (z4 / nose))
              :ARG1 (z5 / vaccine
                        :name (z6 / name
                                  :op1 "Howe"))))
It 's thought that nasal servives attacks the Howe 's vaccine .
z2 :location z4
z2 :ARG0-of z3
z1 :ARG0 z2
z0 :ARG1 z1
z6 :op1 0
z5 :name z6
z1 :ARG1 z5