Police suspect poisoning at German university as students turn blue

The university’s Lichtwiese campus, where students and staff became ill. Photograph: Frank Rumpenhorst/AP

The university’s Lichtwiese campus, where students and staff became ill. Photograph: Frank Rumpenhorst/AP

source https://www.theguardian.com/world/2021/aug/24/police-suspect-poisoning-at-german-university-as-students-turn-blue