Helen Branswell, a veteran journalist who became a trusted source during infectious disease crises, died Tuesday at 69 from complications of cancer, according to her sister. She spent years at the Canadian Press and joined STAT at its founding in 2015, covering outbreaks from SARS to Covid-19 with a mix of breaking-news instincts and scientific depth.

Branswell's reporting was marked by clarity and rigor. WHO Director-General Tedros Adhanom Ghebreyesus praised her commitment to evidence and truth, and she received the Victor Cohn Prize and the George Polk Award. She was also a Pulitzer Prize finalist for early Covid coverage.

Her foresight was notable: in late December 2019 she tweeted about "unexplained pneumonias" in China, and in May 2020 she wrote that Covid vaccines would likely prevent severe disease but not fully block transmission. Experts described her as "a godlike figure" to infectious-disease epidemiologists.

Branswell's career began almost by accident, but she found her calling during Toronto's 2003 SARS outbreak. Her sister said she loved her work and considered it a gift.