We’re reading the solutions to mysteries: What Chopin’s heart revealed, why dengue comes back with a vengeance, and how to end AIDS

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Chopin’s heart, pickled in a jar, offers clues to his death – It took more than a century and a half, a gathering of scientists, church officials and Chopin institute leaders, as well as  knowledge gained through modern medicine to determine, finally, that when the brilliant young composer Frédéric Chopin died in 1849, it was tuberculosis that killed him. The mystery that remains is why, although the knowledge, technology and medicine now exist to diagnose and treat the disease, tuberculosis continues to cut down people in their prime, and  go undetected.

Scientists solve a dengue mystery – The theory that antibodies, gained through exposure to an infection, could worsen the effects of a subsequent exposure to the infection was hard to swallow, because it seemed to contradict the whole point of antibodies. Still something had to explain why for significant numbers of people a second bout of dengue fever is more miserable and life-threatening than the first. STAT infectious disease and global health reporter Helen Branswell breaks down how a large scale study lent the credibility necessary to support the theory.

We can legally control HIV through science, health care access and stigma elimination – Three HIV physician researchers respond here to Georgia state Representative Betty Price (a physician herself, and the wife of former HHS Secretary Tom Price), and her recent question that seemed to imply that quarantining people with HIV could be one approach to controlling the epidemic in her state. The physicians, who are present and past chairs of the HIV Medicine Association explain that the idea is to control the virus, not people, that modern medicine and access to health care can provide the tools to do that, and that stigmatizing attitudes and language — epitomized by suggestion of quarantine, as well as by laws criminalizing HIV — have the opposite effect.

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