The door-to-door of medical students in Cuba to track down the coronavirus

Liz Caballero Gonzalez (l), doctor, and medical student Susana Diaz go door to door in the Vedado district, March 31, 2020 in Havana, during the coronavirus epidemic in Cuba.

"How many people live here?", "Have you had contact with foreigners?", "Do you know the rules of hygiene to follow?": House by house, 28,000 Cuban medical students tirelessly repeat these questions, looking for possible cases of coronavirus.

In the Vedado district of Havana, Doctor Liz Caballero Gonzalez, 46, accompanies two students, responsible for traveling the same block every day, making a total of 300 families.