The CDC was sued under FOIA for all its documentation regarding people who have been infected with COVID-19 and recovered who are unvaxxed, all documentation relative to natural immunity in the COVID-19 recovered, all documentation relative to COVID-19 recovered people becoming reinfected and then transmitting to others. (https://www.icandecide.org/cdc-concedes-never-conducted-vaccinated-v-unvaccinated-study/)
The CDC responded that it had no such documentation and that it was not collecting data relative to any of the requested parameters. This means that the CDC's Director Rochelle Walensky committed perjury in her November 4 testimony before Congress that the CDC had reviewed 96 papers as part of their review submission to Congress, and determined that all COVID-19-recovered people should be vaccinated. (https://www.c-span.org/video/?515699-1/senate-hearing-biden-administrations-covid-19-response)