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You would have been considered fully vaccinated at 14-days from completion of your second dose of vaccine, so that would have been November 19th. Unfortunately, that means this exposure was during the time when we must consider you as unvaccinated or partially vaccinated. You should begin your quarantine as first notice of the exposure and continue to quarantine for an additional 14 days starting the day after the end of isolation for your Covid infected partner (this is because we assume you continue to live with and have contact with your partner). You should get tested immediately (if not yet done) and then get tested again 5-7 days after the end of isolation for your infected partner. Isolate immediately if you develop symptoms or test positive.
The CDC’s guidance is here.