Which action is NOT considered proper handwashing technique?

Handwashing is a critical practice in promoting hygiene and preventing the spread of infections, and it involves specific techniques to be effective. The correct answer identifies washing hands with cold water only as an improper technique.

While it is true that washing hands can be done with cold water, using warm or hot water is generally more effective in helping to dissolve the soap and removing dirt, bacteria, and viruses. Warm water can enhance the effectiveness of soap by allowing it to lather better, which aids in the mechanical action of scrubbing away contaminants. Cold water may not be as effective in this regard, which is why handwashing in cold water alone is not considered proper technique.

The other actions mentioned, including washing hands for at least 20 seconds, using soap and water, and rubbing hands together vigorously, are all essential components of effective handwashing. These practices work together to ensure that pathogens are adequately removed from the hands, thus maintaining personal and public health.