If you’re unvaccinated, you should avoid traveling for the holidays and wear a mask if you attend any indoor Thanksgiving or Halloween parties, the U.S. Centers for Disease Control and Prevention recommends in its new COVID-19 guidelines.

Everyone, whether you are vaccinated or not, should consider skipping indoor holiday events in favor of outdoor or virtual gatherings, according to the updated CDC advice issued Friday.

“Attending gatherings to celebrate events and holidays increases your risk of getting and spreading COVID-19. The safest way to celebrate is virtually, with people who live with you, or outside and at least 6 feet apart from others,” the guidelines say.

If you are hosting an indoor party, the CDC recommends opening windows and getting a fan.

“If celebrating…