When Covid struck in spring 2020 in the Czech Republic, it meant, above all, a radical reduction in contacts. This reduction was a reasonable response from the authorities to the pandemic, which was spreading through physical encounters between people. The schooling of children and young people as well as the work of many adults have moved to their households. When people outside the home had to meet others, such as on public transport or in shops, the obligation to wear a mask began to apply.