ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of health workers are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: A graffiti of a health worker is seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )

ANKARA, TURKEY - APRIL 19: Graffitis of Turkish-German scientists Ugur Sahin and Ozlem Tureci, who made BioNTech’s coronavirus vaccine, are seen on a bridge column on the way of Bilkent City Hospital in Ankara, Turkey on April 19, 2021. ( Evrim Aydın - Anadolu Agency )