China last winter censored doctors who shared "dangerous" misinformation about the novel coronavirus on social media. Now America's self-anointed virus experts and social-media giants are also silencing doctors with contrarian views in an apparent effort to shut down scientific debate. Facebook this week appended a Wall Street Journal op-ed "We'll Have Herd Immunity by April" by Johns Hopkins surgeon Marty Makary (Feb. 19) with the label "Missing Context. Independent fact-checkers say this information could mislead people." According to Facebook, "Once we have a rating from a fact-checking partner, we take action by ensuring that fewer people see that misinformation." The Facebook label links to the third-party site Health Feedback ... an affiliate of the nonprofit Science Feedback that verifies scientific claims in the media. Another Science Feedback affiliate fact-checks climate-related articles in predominantly conservative media. Dr. Makary ... made a projection, much like the epidemiologists at Imperial College and University of Washington do. But the progressive health clerisy don't like his projection because they worry it could lead to fewer virus restrictions. Facebook's fact-checkers "cherry-pick," to borrow their word, studies to support their own opinions, which they present as fact. Facebook's fact checkers are presenting their opinions as fact and seeking to silence other scientists whose views challenge their own.