where the recommendation of who and when is still pending continuing scientific review? I don't think they are caught off guard by evidence suggesting that the vaccine is still better than nothing. The question to answer for boosters is "will a booster perform better than vaccinated but no booster?" which this does not answer.

"We have developed a plan to begin offering these booster shots this fall subject to FDA conducting an independent evaluation and determination of the safety and effectiveness of a third dose of the Pfizer and Moderna mRNA vaccines and CDC’s Advisory Committee on Immunization Practices (ACIP) issuing booster dose recommendations based on a thorough review of the evidence. We are prepared to offer booster shots for all Americans beginning the week of September 20 and starting 8 months after an individual’s second dose."

https://www.cdc.gov/media/releases/2021/s0818-covid-19-booster-shots.html
[Post edited by jmanatVT at 08/18/2021 3:24PM]