Big Tech companies are aggressively tamping down on COVID-19 “misinformation” — opinions and ideas contrary to official pronouncements. Dr. Knut M. Wittkowski, former head of biostatistics, epidemiology and research design at Rockefeller University, says YouTube removed a video of him talking about the virus that had racked up more than 1.3 million views. Wittkowski, 65, is a ferocious critic of the nation’s current steps to fight the coronavirus. He has derided social distancing, saying it only prolongs the virus’ existence, and has attacked the current lockdown as mostly unnecessary. Wittkowski, who holds two doctorates in computer science and medical biometry,...