Lower positivity rate among unvaccinated individuals compared to those who have received at least 1 dose of vaccine
The more vaccinated you are (unless you got your last dose recently), the higher the chance you test positive?
Walgreen COVID-19 index is a surveillance system gathering COVID-19 diagnostic data from tests administered at 6,950 pharmacies across the United States and Puerto Rico. Diagnostic tests include drive-through Rapid Nucleic Acid Amplification tests (Rapid) and Polymerase Chain Reaction (PCR) tests; currently however, the Index only displays results from PCR tests. During the pre-Omicron era, the data demonstrated higher positivity rates among the unvaccinated group. However, in early 2022 the data indicated a lower positivity rate among unvaccinated individuals compared to those who have received at least 1 dose of vaccine. The vaccine effectiveness is in negative according to hospitalization and death data too. The figure above shows results as of July 5, 2022.
Walgreens data could be influenced by testing behavior though.