Dr Shi Zhengli was working on bat Coronavirus research in the US and we closed the program down in 2014 for being too dangerous. She returned to China to continue her research in Wuhan. It is neither fiction, nor dangerous to speculate that this outbreak started at the Wuhan lab. It may not have been engineered. However, the bats are brought to Wuhan lab from hundreds of miles away to be studied. It is also very possible that a bat carrying the natural virus being studied at the lab escapes or infected a person. Why is China reopening the wet markets if they know the virus came from there? I will let you ponder on that.

https://thebulletin.org/2014/03/threatened-pandemics-and-laboratory-escapes-self-fulfilling-prophecies/

https://www.the-scientist.com/news-analysis/sars-escaped-beijing-lab-twice-50137