A lot depends on how you classify "evidence" and how you weight it. New research is coming closer to the explanation of how a weaponized COVID-19 works.
Is it a weaponized form of coronavirus or is it just the flu? It depends on who you talk to. In China (Shanghai to be specific) there are discussions that its RNA sequence makes it more effective against Chinese people. I just report the information. I'm not a researcher.
(link) A new study published in the peer-reviewed journal Antiviral Research (Vol. 16, April 2020) is entitled, “The spike glycoprotein of the new coronavirus 2019-nCoV contains a furin-like cleavage site absent in CoV of the same clade.”
The CoVid-19 coronavirus contains unique features which allow for more effective human-to-human transmission.
Is it a weaponized form of coronavirus or is it just the flu? It depends on who you talk to. In China (Shanghai to be specific) there are discussions that its RNA sequence makes it more effective against Chinese people. I just report the information. I'm not a researcher.
The study cited above found that there is no known viral ancestry to the CoVid-19 coronavirus, meaning it did not evolve from nature. It was engineered, and the science paper authors also state that the virus contains elements from MERS, stating, “Before the emergence of the 2019-nCoV, this important feature was not observed in the lineage b of betacoronaviruses.”