The researchers found that downloads from the site very much matched patterns of diseases spreading. It is most often used to describe and rate the spread of infectious diseases. They then applied a model called SIR to the data. The site contains information on almost 1.4 billion songs, including numbers of downloads. To found out, the group gained access to data stored on the now defunct British music site MixRadio. In this new effort, the researchers wondered how closely the spread of song infections might be to real-world disease spread, such as in epidemics. For many years, some songs have been considered infectious-one person might hear it and then play it for another and those people share with others until the song becomes a hit.
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