For contact tracing purposes, a "close contact" is anyone who spent 15 minutes or more within a 24-hour period and was within 6 feet of a person infected with COVID-19 while they were infectious (2 days before onset of symptoms to 10 days after).

Note: If identified as a close contact of someone with COVID-19, a fully vaccinated person does not need to quarantine as long as they remain asymptomatic. Although the risk that fully vaccinated people could become infected with COVID-19 is low, if symptoms develop, they should isolate and seek medical evaluation for COVID-19, which may include testing. Refer to NJDOH Minimum Quarantine Timeframes for additional information.

Source: Health Commissioner Persichilli's Remarks 10/22/20; https://www.cdc.gov/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/appendix.html#contact