A quick recent anecdote on how hard this is going to be. In early February an NY Times reporter criticized, with some good evidence, Senator Tom Cotton for claiming that the Coronavirus leaked from a lab in Wuhan [1].
By the second week of this month, most of the intelligence agencies in the US had lined up behind this claim of a virus leakage from the Wuhan lab. Additionally Wikileaks cables from 2018 showed State Department officials warning about the conditions of the lab [2].
Another example was the constantly changing official advice on whether people should wear masks or not. Unless you're an expert, it's hard to know which of the conflicting opinions is better supported by the facts (and the facts are constantly changing as new research is published). And the people policing the content at Facebook aren't experts.
By the second week of this month, most of the intelligence agencies in the US had lined up behind this claim of a virus leakage from the Wuhan lab. Additionally Wikileaks cables from 2018 showed State Department officials warning about the conditions of the lab [2].
[1] - https://www.nytimes.com/2020/02/17/business/media/coronaviru...
[2] - https://www.nationalreview.com/news/u-s-diplomats-warned-abo...