Part 1 of 5 · freeIntroduction
During the COVID-19 pandemic, one very simple habit moved back to center stage: washing your hands with soap. No laboratory needed. Just water, soap and a little time.
Why does it work so well? Because many dangerous viruses carry an envelope made of fat. And soap is excellent at destroying fat.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2The weak point of some viruses
- 3Soap, a molecule with two faces
- 4Why 20 seconds
- 5Soap or hand sanitizer?
Open-book quiz8 questions whose answers are in the text.
Glossary11 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
