Omicron is only slightly more contagious than delta for the unvaxxed, at 1.17x.

COVID-19 Vaccine Used in Much of the World No Match for Omicron Variant

Unvaccinated 5X more likely to get omicron than those boosted, CDC reports. Real-world data shows booster doses are standing up to omicron.

How Omicron Is Different Than Delta