For example, scientists never confirmed the origin of smallpox before the disease was eradicated through a global vaccination program. In the case of Severe Acute Respiratory Syndrome (SARS)  a disease caused by a beta coronavirus, like the current coronavirus  researchers first identified the virus in February 2003. From a public health perspective, if a virus has transitioned to being spread mostly by human-to-human contact, discovering its origins is not as essential to strategies for containing the disease. HOW IMPORTANT IS IT TO UNDERSTAND THE ORIGIN? They also believe that the risk of 'accidental culturing' of the virus is 'extremely low'.
people happen to know how important it is to maintain the spread of an yet to be discovered virus and would  accidentally pass it's envelopes repetitively.
( z0 happen :ARG1 ( z1 know :ARG0 ( z2 person ) :ARG1 ( z3 important :ARG1 ( z4 maintain :ARG1 ( z5 spread :ARG1 ( z6 virus :ARG0-of ( z7 pass :ARG1 ( z8 envelope :poss z6 ) :ARG1-of ( z9 repeat ) :manner ( z10 accidental ) ) :ARG1-of ( z11 discover :polarity - :time ( z12 yet ) ) ) ) ) :degree ( z13 so ) ) ) )
(z0 / happen-02
    :ARG1 (z1 / know-01
              :ARG0 (z2 / person)
              :ARG1 (z3 / important-01
                        :ARG1 (z4 / maintain-01
                                  :ARG1 (z5 / spread-03
                                            :ARG1 (z6 / virus
                                                      :ARG0-of (z7 / pass-03
                                                                   :ARG1 (z8 / envelope
                                                                             :poss z6)
                                                                   :ARG1-of (z9 / repeat-01)
                                                                   :manner (z10 / accidental))
                                                      :ARG1-of (z11 / discover-01
                                                                    :polarity -
                                                                    :time (z12 / yet)))))
                        :degree (z13 / so))))
people happen to know how important it is to maintain the spread of an yet to be discovered virus and would accidentally pass it 's envelopes repetitively .
z0 :ARG1 z1
z1 :ARG0 z2
z3 :degree z13
z1 :ARG1 z3
z3 :ARG1 z4
z4 :ARG1 z5
z11 :polarity 0
z11 :time z12
z6 :ARG1-of z11
z5 :ARG1 z6
z7 :manner z10
z6 :ARG0-of z7
z7 :ARG1 z8
z8 :poss z6
z7 :ARG1-of z9