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I couldn't help but think of this XKCD comic: https://xkcd.com/1217/

This study, not to be minimized, works in a cell culture. That is a long way from being an effective treatment in actual humans.

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Youre not going to start giving it to humans based on this study, but comparing it to "x cures cancer" petri dish studies minimizes it a bit too much in my opinion. This is a pretty different type of in vitro study than the "x kills cancer cells" type since it's not measuring something that any d compound (or a gun) would be able to do. This is an antibody that is shown in a specific assay to bind to a part of the virus that is conserved between sars and covid, and they're showing neutralizing action. So, you can put a lot more weight in using this study as the basis of a clinical development program to develop this as an antibody drug than your typical "really high concentrations of this chemical from chocolate killed everything it touched in a petri dish so it's good for cancer!" type of studies.

Yes there are hurdles, but this is a targeted antibody which can be created with an immortalized cell line, not a common drug or vitamin as xkcd says.

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