[1] At some point, during the Peloponnesian war, Athenian generals used Ptychia in order to keep in custody some prisoners.

While the main camps of the recuperating army were on Corfu itself (a contingent was sent to Bizerte as well, and many of the civilian refugees were accepted by France), the sick and near-dying, mostly soldiers, were treated on Vido to prevent epidemics.

In spite of Allied material help, the conditions of both the improvised medical facilities and many of the patients on the island resulted in a high fatality rate.

Due to small area of the island and its rocky soil, it soon became necessary to bury the dead in the sea (by weighting the corpses with rocks to prevent them from floating).

The waters around Vido island are sometimes referred to as the Blue Sea Tomb (Serbian: Plava Grobnica), after a poem written by Milutin Bojić after World War I.