With the risks of drug development prohibitive, repurposed or repositioned medicines appear the best hope against long-COVID, a condition that still raises many unanswered questions.

中文翻译：

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COVID-19 长途运输车

由于药物开发的风险令人望而却步，重新利用或重新定位的药物似乎是对抗长期 COVID 的最佳希望，这种情况仍然引发了许多悬而未决的问题。