How your fitness tracker could lead to nasty skin infections

, dead skin cells, and grime than people may realize - and most users do not think to clean the bands.

Experts have warned that this could put the 40 percent of Americans who own a device at risk of serious infections like pneumonia.

The warnings are a response to a series of investigations carried out by DailyMail.com, which aimed to discover if tracker wearers are at risk of infections.

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