By CBS3 Staff

DOVER, Del. (CBS) – Firefly Music Festival kicks off Thursday in Delaware, and organizers are trying to prevent the spread of COVID-19. Firefly ticketholders must show proof that they’ve been fully vaccinated or show a negative COVID-19 test taken no earlier than 72 hours prior to entry.

The website says you must bring a government-issued photo ID  that matches their proof of vaccine.

The festival kicks off Thursday at the Woodlands of Dover International Speedway with headliner Billie Eilish.