[3] Of Guinean origin, Aïssatou Diallo Sagna grew up in Seine-et-Marne.

[4] Diallo Sagna worked from 2004 as an agente des services hospitaliers (ASH) at the Hôpital Saint-Joseph in Paris.

She obtained a brevet d'études professionnelles (BEP) in health and social care, and a baccalauréat sciences médico-sociales.

[7] In 2020, while the production of Catherine Corsini feature film The Divide was searching for health professionals as extras, Diallo Sagna's colleagues pushed her to participate in the casting.

[6][7] Diallo Sagna was also cast in Corsini's next work, Homecoming, about a caregiver who travels to Corsica.