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Professor Jonathan Kimmelman, Director of the Biomedical Ethics Unit is among the experts quoted by FiveThirtyEight.

"鈥�But there鈥檚 a difference between identifying a drug that might have an effect on a target that might matter to destroying a virus, and finding a drug that definitely kills a virus. The reality is that most potential drugs turn out to not be effective at treating the thing everyone was hopeful they would, even if the drugs looked effective in early clinical trials, which are often small studies that aren鈥檛 randomized and don鈥檛 have a placebo comparison. In fact, said Jonathan Kimmelman, director of the biomedical ethics unit at Canada鈥檚 成人VR视频, that鈥檚 why there is this vast array of existing drugs to test as treatments, to begin with. 鈥淎 lot of drugs that get to Phase II [trials] never demonstrate safety and efficacy and get abandoned. They end up in the graveyard of drugs.鈥�