Mathematicians explain how we should exit the coronavirus lockdown

The COVID-19 pandemic has put the world to the test. Never before have we been so aware of the many ways we come into contact with innumerable others. We have been forced to reassess and retrain common habits, from the handshake to the simple act of opening a door. This is because the virus spreads via physical proximity: direct contact between people (handshakes, kisses, and hugs), coughs, or even touching objects with contaminated droplets. The sum of all of these contacts forms a large and d