By Sandee LaMotte, CNNUpdated 9:56 AM EDT, Fri July 08, 2022 (CNN)In February 2016, infectious disease epidemiologist Steffanie Strathdee was holding her dying husband’s hand, watching him lose an exhausting fight against a deadly superbug infection. After months of ups and downs, doctors had just told her that her husband, Tom Patterson, was too rackedwith...