According to the Food and Drug Administration, in order to protect a worker effectively, a sharp medical device must:

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be easy to use and require only a short period of training

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create a barrier between the hands and the needle once deployed and force the user to keep his or her hands behind the needle tip in all cases

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all the answers are correct

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have an integrated safety system that guarantees that the user is protected also while opening the package and after its use

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