Simona Del Giudice, 16, was taken to a Naples hospital July 28 after the bus she was riding in slammed into a guardrail and fell 328 feet, the Italian news agency ANSA reported.
The bus was carrying a group of friends returning from a weekend excursion when the accident occurred.
Italian officials are investigating the owner of the bus company, his brother and the bus driver who died in the crash.
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