For the purposes of this guidance, people are considered fully vaccinated for COVID-19 ≥2 weeks after they have received the second dose in a 2-dose series (Pfizer-BioNTech or Moderna), or ≥2 weeks after they have received a single-dose vaccine (Johnson & Johnson [J&J]/Janssen)†. There is currently no post-vaccination time limit on fully vaccinated status. People are considered not fully vaccinated if they have not completed a two-dose vaccination series or have not received a single-dose vaccine, regardless of age, including children under the age of 12.
Even the CDC is slimy about what "unvaccinated" means:
https://www.cdc.gov/coronavirus/2019-ncov/vaccines/fully-vaccinated-guidance.html#anchor_1619526549276