A formula for essential questions in our everyday lives
The COVID-19 pandemic was a sad but perfect opportunity to engage with mathematics. Suddenly, we were all confronted with incidence rates, overwhelmed with statistics, and had to deal with probabilities. On a very personal level, with the likelihood of getting infected or the question of how reliable the newly developed COVID-19 tests were. Questions that could decide on freedom, health, and for some even on life and death.



