Final answer:
The CDC recommends washing hands with warm water and soap to effectively remove germs and prevent illness. At least 20 seconds of thorough scrubbing is necessary, followed by proper rinsing and drying of hands.
Step-by-step explanation:
The water temperature recommended for hand washing should be warm, according to the Centers for Disease Control and Prevention (CDC). Washing your hands with warm water combined with soap is an effective way to eliminate germs and prevent the spread of diseases. It's important to wet your hands with clean, running water, which can be warm or cold, and to apply soap. Thoroughly lather your hands, making sure to scrub all surfaces, including the backs of your hands, between your fingers, and under your nails, for at least 20 seconds. Rinse your hands well under clean, running water and dry them using a clean towel or air dryer. If available, use a towel to turn off the tap and to open the door to leave the bathroom, avoiding recontamination of clean hands.