The Covid-19 pandemic, devastating as it is, is producing some triumphs of collaborative research and innovation, as everyone from the World Health Organization to national laboratories, pharmaceutical companies, and Facebook groups of engineers race to fight the virus. But lurking behind this remarkable work is a threat: Some individuals or companies may exploit patents to profiteer off the crisis and could slow these innovative efforts to a crawl. (Christopher Morten and Charles Duan, 4/14)

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