But such speculation needs to be tested  we cant just rely on an educated guess. Prof Paul Morgan, the director of the Systems Immunity Research Institute at Cardiff University and a member of the British Society for Immunologys expert taskforce on immunology and Covid-19, said there were other reasons for optimism. The Indian researchers agreed that further studies using high antibody levels may find it to be more effective. Plasma is the clear, yellowish liquid part of the blood which carries red and white blood cells and platelets around the body. Such purified antibodies are already used to treat patients with antibody deficiencies.
39 of variants 395 were not tested.
( z0 test :ARG1 ( z1 variant :quant 39 :ARG1-of ( z2 include :ARG2 ( z3 variant :mod 395 ) ) ) :polarity - )
(z0 / test-01
    :ARG1 (z1 / variant
              :quant 39
              :ARG1-of (z2 / include-91
                           :ARG2 (z3 / variant
                                     :mod 395)))
    :polarity -)
39 of variants 395 were not tested .
z1 :ARG1-of z2
z1 :quant 1
z2 :ARG2 z3
z3 :mod 2
z0 :polarity 0
z0 :ARG1 z1