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What is cross-contamination?

  1. Interproximal/BWX

  2. Movement during exposure

  3. Short wavelengths

  4. The spreading of microorganisms from one person to another.

The correct answer is: The spreading of microorganisms from one person to another.

Cross-contamination is the process or act of spreading microorganisms from one person to another. It can happen through direct contact, such as touching an infected person, or indirect contact, such as touching an object that has been contaminated by someone else. It is not related to the other options, which refer to dental terminology and techniques. It is also not limited to short wavelengths or movement during exposure, but rather refers to the transmission of potentially harmful microorganisms.