
BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker cleans the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )

BUDAPEST, HUNGARY - APRIL 13: A worker walks through the tunnel in the center of Budapest with a high-pressure emitter in Budapest, Hungary on April 13, 2020. ( Arpad Kurucz - Anadolu Agency )