It was a study that had to be done, even though the results are kind of predictable. Some people remark, when asked to use biometric devices such as fingerprint scanners, that they are unsanitary and a health risk. The obvious question is “Are they more unsanitary than other things we touch every day, such as doorknobs?” This study tells us that the answer is “No”.
The dirty details of biometrics
If the fingerprint-smudged glass plates on biometric devices skeeve you out, Purdue University researchers have some good news for you: The devices aren’t any germier than typical doorknobs. Christine Blomeke, a researcher and doctoral student in Purdue’s Biometric Standards, Performance and Assurance Laboratory, says the lab performed a study on this issue in light of concerns by those involved in fingerprint and hand-geometry studies at the lab. The study involved testing for two kinds of bacteria, staphylococcus aureus and E.coli.
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That is OK, but what about some allegations that the rays emiited from the scanners are having some risk on human, it might lead to cancer. any research on this