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. 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. The research involved 464 adults with moderate Covid-19 who were admitted to hospitals in India between April and July.
the research is proopedion and needs to be studied
( z0 and :op ( z1 publication :name ( z2 name ) :domain ( z3 research ) :op ( z4 revolution ) ) :op ( z5 need :ARG1 ( z6 study :ARG1 z3 ) ) )
(z0 / and
    :op1 (z1 / publication
             :name (z2 / name)
             :domain (z3 / research-01)
             :op1 (z4 / revolution-03))
    :op2 (z5 / need-01
             :ARG1 (z6 / study-01
                       :ARG1 z3)))
the research is proopedion and needs to be studied
z1 :domain z3
z1 :name z2
z1 :op1 z4
z0 :op1 z1
z0 :op2 z5
z5 :ARG1 z6
z6 :ARG1 z3