Rappoport pointed out that more unvaccinated people are are being diagnosed with COVID because they are more likely to get a test than vaccinated people. Also, the test protocol has been altered for vaccinated people to make the tests less sensitive, and therefore, producing fewer false positive results.
Biden explicitly blamed the unvaccinated for the surge in case numbers despite many who have received the jab have also been diagnosed with COVID. The CDC also recommended indoor masks for all teachers, staff, students and visitors at schools nationwide, regardless of vaccination status. A recommendation is not a law.