All passengers must have their noses and mouths covered before entering public transport premises and vehicles, and at all times throughout their journey. Prague Public Transit Company is also introducing other preventive measures: buses will now stop at all bus stops, including request-only stops; air-conditioning and air circulation will not be used in buses and trams; 38 bus lines will stop operating at 10:30pm each day; and the AirportExpress line will be stopped. These measures are being put in place to protect passengers and drivers, and to reduce the spread of the coronavirus Covid-19. They are valid until further notice