This “ first known cluster ’ aware , victims believe COVID-19. ” Influenza could completely ruled seemed unlikely circumstances , said.Comparing rival scenarios SARS2 origin.The evidence adds serious case SARS2 virus could created lab , escaped.But case , however substantial , falls short proof.Proof would consist evidence Wuhan Institute Virology , related labs Wuhan , SARS2 predecessor virus development there.For lack access records , another approach take certain salient facts SARS2 virus ask well explained two rival scenarios origin , natural emergence lab escape.Here four tests two hypotheses.A couple technical detail , among persuasive may care follow argument.1 ) The place origin.Start geography .