True: Washing Hands With Soap Lowers the Risk of Diarrhea and Respiratory Infection

The claim that washing hands with soap lowers the risk of infectious disease is true and backed by strong scientific evidence.

What we checked

Health messages say washing hands with soap can prevent diarrhea and respiratory infections. We reviewed guidance and evidence from health authorities.

Evidence

Scientific reviews and guidance from the WHO and the US CDC confirm that washing hands with soap reduces both diarrhea and respiratory-infection incidence. The mechanism is clear: soap lifts and removes germs from the skin, breaking the chain of transmission. The WHO and CDC rank hand hygiene among the cheapest, most effective public-health interventions.

Conclusion

Washing hands with soap does lower disease risk. The claim is true.