One study tested smartphones belonging to secondary school students. Not only were the phones loaded with potentially harmful bacteria, but researchers hypothesized that they also contributed to the spread of illnesses throughout the community. OK, so you probably suspected teenagers were doing that anyway, but what about doctors and nurses? Surely, they of all people understand the importance of keeping things clean? That's ... not what the evidence says.
Studies carried out everywhere from the U.S. to Egypt to Australia tested phones belonging to hospital workers and found that a clear majority (75 to 100 percent) carried bacteria. In France, 42 out of 109 hospital workers' smartphones carried viruses, while in Turkey, 25 out of 200 tested positive for MRSA -- you know, that superbug that fills your body with pus-oozing boils. So if you've got a hospital stay coming up, here's hoping your phone-addicted doctor doesn't have another patient with flesh-eating bacteria.