Quarantine can end on day 7 if asymptomatic with negative test. Can use PT-PCR or antigen--same residual risk. Specimen must be collected within 48 hours of day 7 (day 5). Cannot end quarantine earlier than day 7.
Quarantine can end on day 10 if asymptomatic and no testing available. Must still screen for symptoms and practice NPIs through day 14. Don't divert testing resources just to shorten quarantine.