There are probabilities, and there are possibilities, said Banerjee. We rarely get a smoking gun, said Stephen Morse, a disease researcher at Columbia University. Nearly 600,000 people in the United States have died of COVID-19, the highest toll of any country. Covid-19 has killed more than 2.8 million people worldwide in the 15 months since it emerged, forcing governments around the world to introduce punishing restrictions that have pummelled the global economy. While the closest known viruses to Covid-19 have been found in bats, the 'evolutionary distance' between them is thought to be 'several decades'.
over 599000 people have died of the illness but still uncertain how to resolve the humanitarian aspect of the question.>
( z0 have-concession :ARG1 ( z1 know :ARG1 ( z2 thing :manner-of ( z3 resolve :ARG1 ( z4 aspect :mod ( z5 humanitarian ) :poss ( z6 question ) ) ) ) :mod ( z7 still ) :polarity - ) :ARG2 ( z8 die :ARG1 ( z9 person :quant ( z10 over :op 599000 ) ) ) :rel ( z11 ill ) )
(z0 / have-concession-91
    :ARG1 (z1 / know-01
              :ARG1 (z2 / thing
                        :manner-of (z3 / resolve-01
                                       :ARG1 (z4 / aspect
                                                 :mod (z5 / humanitarian)
                                                 :poss (z6 / question))))
              :mod (z7 / still)
              :polarity -)
    :ARG2 (z8 / die-01
              :ARG1 (z9 / person
                        :quant (z10 / over
                                    :op1 599000)))
    :rel (z11 / ill-01))
over 599000 people have died of the illness but still uncertain how to resolve the humanitarian aspect of the question . >
z10 :op1 1
z9 :quant z10
z8 :ARG1 z9
z0 :ARG2 z8
z1 :polarity 0
z1 :mod z7
z0 :ARG1 z1
z1 :ARG1 z2
z2 :manner-of z3
z4 :mod z5
z3 :ARG1 z4
z4 :poss z6
z0 :rel z11