If I have tested positive for COVID-19 and live with someone who has received the COVID-19 vaccine, do they need to quarantine and watch for symptoms even though they are vaccinated?

Yes. Regardless of vaccination status, if someone has been exposed to COVID-19, they should start taking precautions immediately. 

1. Wear a mask as soon as you find out you were exposed
   • Start counting from Day 1
   • Day 0 is the day of your last exposure to someone with COVID-19
   • Day 1 is the first full day after your last exposure
2. Wear a high-quality mask or respiratory (N95) any time around others, including inside of your home
   • Avoid places where you are unable to wear a mask
3. Monitor your symptoms for symptoms of COVID-19:
   • Fever (100.4°F or greater)
   • Cough
   • Shortness of breath
   • Other COVID-19 symptoms
4. If you develop symptoms:
   • Isolate immediately
   • Get tested
   • If you test positive, follow isolation procedures
   • Stay home until you know your test result
5. On day 6, take a COVID-19 test
   • Get tested at least 5 full days after your last exposure
   • Test even if you don’t have symptoms
   • If you test positive, follow isolation procedures
   • If you test negative, continue to wear a high-quality mask when around others at home and indoors in public until day 10

You can still develop COVID-19 up to 10 days after you have been exposed.