What to know as new COVID virus variants like XBB.1.5 spread fast across the U.S.
New XBB.1.5 variant's spread has caught the attention of health officials.
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Harriet Blair Rowan is a data reporter. Rowan received her master's degree from the University of California, Berkeley Graduate School of Journalism. She previously did investigative research and data reporting for Reveal, from the Center for Investigative Reporting, and Kaiser Health News.