Cough is a ubiquitous health indicator whose impact is extreme and underappreciated. As an information-rich symptom that is associated with a myriad of diseases, cough is also the ideal clinical endpoint. Yet, cough continues to be assessed mainly through subjective surveys, as it has been for decades, even centuries. More than half the world population now carries smartphones that can be used as clinical tools for quantifying cough endpoints objectively. Scalable mobile cough monitoring has the potential to transform clinical trials by increasing their success rate, decimating their costs, accelerating products to market, and improving health equity worldwide.
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