Questions of origins and questions of disease control are not the same thing once human-to-human transmission has become common, said Deborah Seligsohn, an expert in environment and public health at Villanova University. There are probabilities, and there are possibilities, said Banerjee. HOW IMPORTANT IS IT TO UNDERSTAND THE ORIGIN? Confirming with 100% certainty the origin of a virus is often not fast, easy, or always even possible. While the closest known viruses to Covid-19 have been found in bats, the 'evolutionary distance' between them is thought to be 'several decades'.
the expagher mentioned here has gotlings over and informed that avir might not be secure.
( z0 and :op ( z1 left :ARG1 ( z2 person :ARG1-of ( z3 mention :location ( z4 here ) ) :mod ( z5 executive ) ) :direction ( z6 over ) ) :op ( z7 inform :ARG1 z2 :ARG2 ( z8 possible :ARG1 ( z9 secure :ARG1 ( z10 avir ) :polarity - ) ) ) )
(z0 / and
    :op1 (z1 / left-19
             :ARG1 (z2 / person
                       :ARG1-of (z3 / mention-01
                                    :location (z4 / here))
                       :mod (z5 / executive))
             :direction (z6 / over))
    :op2 (z7 / inform-01
             :ARG1 z2
             :ARG2 (z8 / possible-01
                       :ARG1 (z9 / secure-02
                                 :ARG1 (z10 / avir)
                                 :polarity -))))
the expagher mentioned here has gotlings over and informed that avir might not be secure .
z2 :mod z5
z2 :ARG1-of z3
z3 :location z4
z1 :ARG1 z2
z1 :direction z6
z0 :op1 z1
z0 :op2 z7
z7 :ARG1 z2
z7 :ARG2 z8
z9 :polarity 0
z8 :ARG1 z9
z9 :ARG1 z10