The fact
The event, held from July 17 to 20 in Carhaix, left health issues among participants.
The exact causes of the illnesses are still under investigation.
Click the link to read an article on the topic:
Why it matters
Les intoxications massives lors d'un festival majeur soulèvent des questions sur la sécurité sanitaire et les conditions d'accueil des événements publics.