Researchers withdraw their findings,

that HC can increase mortality, and heart issues, in the treatment of Covid -19. British Medical Journal embarrassed, again. As was the Lancet for touting an association between vaccinations and Autism, based merely of an anecdotal case series of 8 pediatric patients. Any lessons here? There are quite a few for fair minded folks to learn from.
For starters, detecting and characterizing valid relationships between illness and other factors in free living human populations, is tricky business. Policy from science rests on much more than research outcomes, however seemingly robust. Less so if results are weak, or inconsistent.
Just as important, we must be ever vigilant of how politics can influence science. The Universities and research labs are largely staffed and administered by folks of one political view. Just as those of big Pharma, perhaps in other profit oriented biased directions.
And relying reflexively on clearly biased media resources, such as the NYT, or Washington Post, for scientific information, is fraught with danger of being in error. Reporting/journalism often has become political activism, leading to similar invalid information. Fortunately, we now have much better understanding of how this goes, with the clear existence of Trump Derangement-Hilary Deficit Syndromes. It goes like this. One reads a story on some biased outlet. Instantly, in a rush to support ones side, and to feel smug and clever, without reflection, the typing/posting starts. It's all made much worse when the sufferers of the Syndromes have little, and often none, of the needed education for supporting such often biased assertions. Teaching in HS, and a little time working as a lab assistant, or realtor, etc., are honorable gigs, but inadequate to the task.
Finally, RED MAN BAD, is the deep syndromic emotion. But RM not always wrong, is often the truth..