Sacramento's Aftershock Festival has followed suit with health protocols issued at similar events around the country and will require proof of vaccination, or a negative COVID test within 72 hours of the date you're attending to enter the festival grounds.
Aftershock will require masks in any indoor spaces, regardless of vaccination status and strongly requests that all fans wear a mask while in the festival grounds.
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The festival features performances from Metallica, Limp Bizkit, Misfits, Machine Gun Kelly, Offspring, and many more.
More info on the festival's health & safety protocols can be found here.