Final answer:
The CDC recommends that the CNA should wash their hands under running water for at least 20 seconds, focusing on commonly missed areas.
Step-by-step explanation:
The CDC recommends that the CNA wash their hands under running water for at least 20 seconds. They should wet their hands with clean, running water, apply soap, and scrub their hands for the recommended duration. It is important to wash the most commonly missed areas, such as the thumb, wrist, areas between the fingers, and the skin under the nails. After scrubbing, the hands should be rinsed thoroughly from the wrist to the fingertips, and then dried with a clean towel or hot air blower.