Dr. Anthony Fauci was shown laughing off the widely accepted lab-leak theory as “molecularly impossible” in a new documentary — while also saying he would’ve implemented quarantines and mask mandates sooner. The then-White House adviser was followed by PBS throughout 2021 and 2022 as he became a polarizing figure while leading President Biden’s response to the pandemic. In it, he railed against Sen. Rand Paul (R-Ky.) “insidiously” suggesting in Congress in July 2021 that his National Institutes of Health had funded gain-of-function research at the lab in Wuhan where COVID first emerged. Fauci confirmed that the “number of experiments that...