Excessive, overblown concerns! Possibly the precautionary principle at work! Had our ancestors so many fears and concerns as we have now, we would still be living in caves!
Blood plasma transfusions are harmless and have been used for decades! If they have some positive effect on some Covid-19 patients why not!
Evidence lags behind excitement over blood plasma as a coronavirus treatment (Nature 8/19/2020, a dated article) Researchers call for more rigorous clinical trials as rumours abound that US regulators are considering widening access to the potential therapy.
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