Johnson & Johnson manufacturing error will short-change Oregon by 200,000-300,000 doses, but officials widen the expansion.
Migrant workers, frontline workers and multi-generational households are among the groups that will become eligible for vaccination sooner than expected.
But the general population may still face delays, as Oregon officials plan to keep allocating doses in a targeted way to reach vulnerable groups.
Deschutes, Klamath, Lane, Multnomah and Yamhill, which are advancing from high to moderate risk will see looser restrictions on businesses.
The Centers for Disease Control and Prevention calls for vaccinating essential workers ahead of people 64 to 74 but Gov. Kate Brown is making grocery and other workers wait eight more weeks.
Some school districts have already started sending students back into the classroom, while others have laid out reopening plans and are surveying families.
The governor told the Oregon Health Authority it could release the information weekly but the agency said it will stick to daily reporting.
The Oregon Health Authority said it lacks the personnel to continue releasing details but the decision means it will be impossible to track the effect of the governor's decision to delay the vaccination of seniors.