But quite propaganda victory Chinese authorities may hoping for.What became clear Chinese evidence offer commission support natural emergence theory.This surprising SARS1 MERS viruses left copious traces environment.The intermediary host species SARS1 identified within four months epidemic ’ outbreak , host MERS within nine months.Yet 15 months SARS2 pandemic began , presumably intensive search , Chinese researchers failed find either original bat population , intermediate species SARS2 might jumped , serological evidence Chinese population , including Wuhan , ever exposed virus prior December 2019.Natural emergence remained conjecture , however plausible begin , gained shred supporting evidence year.And long remains case , ’ logical pay serious attention alternative conjecture , SARS2 escaped lab .