Go to page 9 and see what was mandated for that: https://www.cdc.gov/flu/pandemic-resources/pdf/community_mit...
It was voluntary isolation of the sick, 'consider' shutting down of schools but only for 4 weeks or less, and to 'consider' social distancing - based only on the age profile of virus deaths.
We've ignored everything previously established for pandemic response.
You'll also note that in this document, there is zero mention of contact tracing. Its basically impossible and fruitless for a respiratory virus. Attempting contact tracing is really just about pushing acceptance of general location tracking onto the population.