But such speculation needs to be tested  we cant just rely on an educated guess. Get CNN Health's weekly newsletter Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team. The Indian researchers agreed that further studies using high antibody levels may find it to be more effective. However, data were still being collected in randomized controlled trials  the gold standard  to study the safety and effectiveness of the treatment. 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.
Such speculative ain't been tested  we can not label them as valid.
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(z0 / possible-01
    :ARG1 (z1 / label-01
              :ARG0 (z2 / we)
              :ARG1 (z3 / they
                        :ARG1-of (z4 / speculate-01)
                        :mod (z5 / such))
              :ARG2 (z6 / valid-02
                        :ARG1 z3))
    :condition (z7 / test-01
                   :ARG1 z3
                   :polarity -)
    :polarity -)
Such speculative ai n't been tested we can not label them as valid .
z7 :polarity 0
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z0 :polarity 1
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z1 :ARG0 z2
z1 :ARG1 z3
z7 :ARG1 z3
z3 :ARG1-of z4
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