18 Why Did The CDC Stop Recording Vaccine Breakthrough Cases in The U.S. on May 1st? – Obvious Answer - Vaccine Companies Want to Sell Booster Shots September 17, 2021 | Sundance | 483 Comments (theconservativetreehouse.com) posted 3 years ago by seernewday 3 years ago by seernewday +19 / -1 3 comments share 3 comments share save hide report block hide replies
They didn't.
https://www.cdc.gov/vaccines/covid-19/health-departments/breakthrough-cases.html
Last update was on September 13th.