Per the CDC as of 1/13/2023:

If you have been exposed to someone with COVID, you do not need to quarantine as long as you remain asymptomatic, regardless of your vaccination status. You must wear a mask any time you are around others inside your home or indoors in public for the 10 days following your exposure, unless you are unable to mask*.

If you were exposed and develop symptoms at any time, isolate and take a test and stay home until you know the result. If the result is positive, follow isolation protocols. If your test is negative or if you have remained asymptomatic, take a test on day 6.

• If you have not had COVID-19 in the last 90 days, you can test with either a rapid antigen or PCR test.
• People who had COVID-19 in the last 90 days should test with a rapid antigen test, not a PCR test.
• People who had COVID-19 in the last 30 days are not recommended to test on day 6 but should use a rapid antigen test if they develop any symptoms.

If you test positive, follow isolation guidance. For more information, please see CDC COVID-19 Exposure Guidance.

* You are unable to consistently wear a mask due to young age or medical or behavioral condition.