Researchers from academia and the federal government found a biochemical pathway they say might explain why COVID-19 is so difficult to treat, and they suggest that pairing antiviral drugs, such as remdesivir, with a Janus kinase inhibitor, such as ruxolitinib, might be more effective in treating the disease than monotherapy alone. One researcher said the data are promising but cautioned the dataset itself should not be used to make treatment decisions. “[I]t is important to acknowledge that we carried out...