The single market is generally considered to be the cornerstone of the EU economy and one of the greatest achievements of the European Union. Comprising nearly 450 million people and 20 million enterprises, it constitutes the largest integrated market in the world, worth €14 trillion in 2018.
The free movement of persons, goods, services and capital is the pillar on which the single market is built. The cross-border movement of the first three has been severely affected by the pandemic of Covid-19. Soon after its outbreak, the majority of Member States reintroduced internal border controls on grounds of an immediate threat to public health. These have been accompanied by restrictions or bans on international passenger transport and bans on entry and exit. Naturally,