The CDC recently updated its guidance on what constitutes close contact for purposes of COVID-19 exposure.
Previously, the CDC considered close contact to be when a person was within six (6) feet of an infectious individual for 15 consecutive minutes.
The updated guidance clarifies that individuals spending a total of 15 minutes of contact with an infectious person over the course of a 24-hour period is considered in close contact (e.g., three 5-minute exposures for a total of 15 minutes).