Policemen stop a bus to check passengers' certificates indicating the reasons of movement at Elefsina, west of Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

Passengers of a bus show their certificates indicating the reason of movement to policemen in Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

A passenger of a bus shows her certificates indicating the reason of movement to a policeman in Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

A policeman checks a driver's certificate indicating the reason of movement at Elefsina, west of Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

Policemen check drivers' certificates indicating the reasons of movement at Elefsina, west of Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

Policemen check drivers' certificates indicating the reasons of movement at Elefsina, west of Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

Policemen check drivers' certificates indicating the reasons of movement at Elefsina, west of Athens, Greece, April 18, 2020. The Greek government announced on Thursday that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)

Policemen check drivers' certificates indicating the reasons of movement at Elefsina, west of Athens, Greece, April 18, 2020. The Greek government announced on April 16 that stiffer fines await those who violate the containment measures introduced to curb the spread of the novel coronavirus, as the country is preparing to celebrate Orthodox Easter on April 19. The authorities have beefed up controls at toll plazas on national highways to prevent the traditional mass exodus to the countryside from urban centers. (Xinhua/Marios Lolos)