Correct Answer: E Clean hands - Silent Sales Machine

Understanding the Context

Why Clean Hands Are Crucial

Hands come into contact with countless surfaces throughout the day—door handles, keyboards, shopping carts, and more—making them prime carriers of pathogens. According to the Centers for Disease Control and Prevention (CDC), handwashing is one of the most effective ways to prevent respiratory infections, stomach illnesses, and the spread of diseases like flu and COVID-19.

Keeping hands clean breaks the chain of infection, protecting both yourself and others. Healthcare workers, teachers, food handlers, and families benefit immensely from maintaining clean hands at all times.

Key Insights

The Correct Way to Wash Hands

Follow these simple steps to ensure your hands are truly clean:

1. Wet hands with clean, running water (warm or cold).
   
2. Apply enough soap to cover all hand surfaces.
   
3. Lather well by rubbing your hands together—don’t forget backs, between fingers, and under nails for at least 20 seconds.
   
4. Scrub for the full duration—sing the “Happy Birthday” song twice as a helpful timer.
   
5. Rinse thoroughly under clean, running water.
   
6. Dry hands completely with a clean towel or air dryer—moist hands spread germs more easily.

Proper handwashing removes dirt, bacteria, and viruses more effectively than hand sanitizer—especially when hands are visibly dirty.

Final Thoughts

When Should You Wash Your Hands?

The World Health Organization (WHO) identifies key moments to wash hands:

• After coughing or sneezing
  
• Before eating or preparing food
  
• After using the restroom
  
• After touching animals or trash
  
• Before and after caring for someone sick
  
• After blowing your nose, coughing, or sneezing
  
• After handling garbage,公共设施, or public transport

Adopting this habit builds a strong layer of protection against everyday health risks.

When Hand Sanitizer Is Appropriate